./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.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_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/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_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/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_5a233025-d827-4677-b812-e51bd89e50d8/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 f8d951c4402488c95b1d9f665863df74bf845558698369360669f9c187af26b8 --- 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 02:07:30,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:30,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:31,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:31,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:31,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:31,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:31,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:31,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:31,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:31,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:31,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:31,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:31,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:31,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:31,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:31,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:31,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:31,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:31,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:31,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:31,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:31,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:31,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:31,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:31,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:31,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:31,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:31,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:31,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:31,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:31,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:31,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:31,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:31,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:31,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:31,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:31,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:31,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:31,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:31,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:31,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:07:31,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:31,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:31,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:31,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:31,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:31,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:31,160 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:31,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:31,161 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:31,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:31,162 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:31,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:31,163 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:31,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:31,163 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:31,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:31,164 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:31,164 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:31,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:31,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:31,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:31,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:31,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:31,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:31,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:31,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:31,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:31,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:31,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:31,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:31,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:31,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:31,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:31,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:31,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:31,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:31,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:31,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:31,177 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_5a233025-d827-4677-b812-e51bd89e50d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d951c4402488c95b1d9f665863df74bf845558698369360669f9c187af26b8 [2022-11-03 02:07:31,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:31,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:31,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:31,531 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:31,532 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:31,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:07:31,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/65d9ccf12/2d69dcff1ecb47bcaf9846b39832baef/FLAG05f69e8c7 [2022-11-03 02:07:32,237 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:32,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:07:32,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/65d9ccf12/2d69dcff1ecb47bcaf9846b39832baef/FLAG05f69e8c7 [2022-11-03 02:07:32,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/65d9ccf12/2d69dcff1ecb47bcaf9846b39832baef [2022-11-03 02:07:32,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:32,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:32,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:32,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:32,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:32,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:32" (1/1) ... [2022-11-03 02:07:32,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d37f71a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:32, skipping insertion in model container [2022-11-03 02:07:32,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:32" (1/1) ... [2022-11-03 02:07:32,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:32,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:32,764 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_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:33,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:33,211 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:33,222 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_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:33,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:33,394 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:33,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33 WrapperNode [2022-11-03 02:07:33,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:33,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:33,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:33,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:33,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:33,459 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:33,802 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2410 [2022-11-03 02:07:33,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:33,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:33,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:33,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:33,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:33,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:33,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:33,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,144 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:34,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:34,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:34,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:34,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (1/1) ... [2022-11-03 02:07:34,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:34,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:34,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:34,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:34,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:34,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:34,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:17:12,379 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:17:53,324 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:17:53,324 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:17:53,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:17:53 BoogieIcfgContainer [2022-11-03 02:17:53,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:17:53,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:17:53,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:17:53,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:17:53,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:32" (1/3) ... [2022-11-03 02:17:53,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56425a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:17:53, skipping insertion in model container [2022-11-03 02:17:53,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:33" (2/3) ... [2022-11-03 02:17:53,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56425a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:17:53, skipping insertion in model container [2022-11-03 02:17:53,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:17:53" (3/3) ... [2022-11-03 02:17:53,336 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:17:53,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:17:53,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:17:53,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:17:53,399 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;@41907e24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:17:53,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:17:53,403 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 02:17:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:17:53,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:53,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:17:53,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 9686048, now seen corresponding path program 1 times [2022-11-03 02:17:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:53,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516305236] [2022-11-03 02:17:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:17:53,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:17:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:17:54,179 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:17:54,181 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:17:54,182 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:17:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:17:54,188 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:17:54,193 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:17:54,235 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:17:54,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:17:54 BoogieIcfgContainer [2022-11-03 02:17:54,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:17:54,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:17:54,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:17:54,249 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:17:54,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:17:53" (3/4) ... [2022-11-03 02:17:54,253 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:17:54,254 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:17:54,255 INFO L158 Benchmark]: Toolchain (without parser) took 621837.39ms. Allocated memory was 102.8MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 57.1MB in the beginning and 1.6GB in the end (delta: -1.6GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-11-03 02:17:54,255 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:17:54,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 969.50ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 57.0MB in the beginning and 60.0MB in the end (delta: -3.1MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. [2022-11-03 02:17:54,257 INFO L158 Benchmark]: Boogie Procedure Inliner took 406.69ms. Allocated memory is still 123.7MB. Free memory was 59.5MB in the beginning and 46.4MB in the end (delta: 13.0MB). Peak memory consumption was 41.0MB. Max. memory is 16.1GB. [2022-11-03 02:17:54,258 INFO L158 Benchmark]: Boogie Preprocessor took 398.70ms. Allocated memory was 123.7MB in the beginning and 234.9MB in the end (delta: 111.1MB). Free memory was 46.4MB in the beginning and 137.2MB in the end (delta: -90.7MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2022-11-03 02:17:54,258 INFO L158 Benchmark]: RCFGBuilder took 619123.96ms. Allocated memory was 234.9MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 137.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. [2022-11-03 02:17:54,259 INFO L158 Benchmark]: TraceAbstraction took 920.03ms. Allocated memory is still 4.2GB. Free memory was 1.7GB in the beginning and 1.6GB in the end (delta: 82.8MB). Peak memory consumption was 83.9MB. Max. memory is 16.1GB. [2022-11-03 02:17:54,259 INFO L158 Benchmark]: Witness Printer took 4.99ms. Allocated memory is still 4.2GB. Free memory is still 1.6GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:17:54,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 102.8MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 969.50ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 57.0MB in the beginning and 60.0MB in the end (delta: -3.1MB). Peak memory consumption was 20.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 406.69ms. Allocated memory is still 123.7MB. Free memory was 59.5MB in the beginning and 46.4MB in the end (delta: 13.0MB). Peak memory consumption was 41.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 398.70ms. Allocated memory was 123.7MB in the beginning and 234.9MB in the end (delta: 111.1MB). Free memory was 46.4MB in the beginning and 137.2MB in the end (delta: -90.7MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. * RCFGBuilder took 619123.96ms. Allocated memory was 234.9MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 137.2MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 2.4GB. Max. memory is 16.1GB. * TraceAbstraction took 920.03ms. Allocated memory is still 4.2GB. Free memory was 1.7GB in the beginning and 1.6GB in the end (delta: 82.8MB). Peak memory consumption was 83.9MB. Max. memory is 16.1GB. * Witness Printer took 4.99ms. Allocated memory is still 4.2GB. Free memory is still 1.6GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 284, overapproximation of bitwiseAnd at line 213. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 32); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (32 - 1); [L34] const SORT_2 var_4 = 0; [L35] const SORT_1 var_25 = 0; [L36] const SORT_3 var_88 = 1; [L37] const SORT_3 var_89 = 0; [L38] const SORT_2 var_98 = 255; [L39] const SORT_2 var_100 = 0; [L40] const SORT_2 var_103 = 2; [L41] const SORT_2 var_107 = 1; [L43] SORT_1 input_99; [L44] SORT_1 input_104; [L45] SORT_1 input_108; [L46] SORT_1 input_111; [L47] SORT_1 input_123; [L48] SORT_1 input_135; [L49] SORT_1 input_147; [L50] SORT_1 input_150; [L51] SORT_1 input_153; [L52] SORT_1 input_156; [L53] SORT_1 input_166; [L54] SORT_1 input_176; [L55] SORT_1 input_186; [L56] SORT_1 input_187; [L57] SORT_1 input_188; [L58] SORT_1 input_189; [L59] SORT_1 input_190; [L60] SORT_1 input_191; [L61] SORT_1 input_215; [L62] SORT_1 input_217; [L63] SORT_1 input_227; [L64] SORT_1 input_232; [L65] SORT_1 input_234; [L66] SORT_1 input_239; [L67] SORT_1 input_243; [L68] SORT_1 input_258; [L69] SORT_1 input_260; [L70] SORT_1 input_270; [L71] SORT_1 input_275; [L72] SORT_1 input_277; [L73] SORT_1 input_282; [L74] SORT_1 input_286; [L75] SORT_1 input_301; [L76] SORT_1 input_303; [L77] SORT_1 input_313; [L78] SORT_1 input_318; [L79] SORT_1 input_320; [L80] SORT_1 input_325; [L81] SORT_1 input_329; [L83] SORT_2 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L84] SORT_2 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L85] SORT_2 state_9 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L86] SORT_2 state_11 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L87] SORT_2 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L88] SORT_2 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L89] SORT_2 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L90] SORT_2 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L91] SORT_2 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L92] SORT_2 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L93] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L100] SORT_1 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_1 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L102] SORT_1 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L103] SORT_1 state_46 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L104] SORT_1 state_48 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L105] SORT_1 state_50 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L106] SORT_1 state_52 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L107] SORT_1 state_54 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L108] SORT_1 state_56 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L109] SORT_1 state_58 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L111] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L112] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L113] SORT_1 state_66 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_68 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_72 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_74 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_76 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_78 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_80 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_82 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_84 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_86 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_2 init_6_arg_1 = var_4; [L126] state_5 = init_6_arg_1 [L127] SORT_2 init_8_arg_1 = var_4; [L128] state_7 = init_8_arg_1 [L129] SORT_2 init_10_arg_1 = var_4; [L130] state_9 = init_10_arg_1 [L131] SORT_2 init_12_arg_1 = var_4; [L132] state_11 = init_12_arg_1 [L133] SORT_2 init_14_arg_1 = var_4; [L134] state_13 = init_14_arg_1 [L135] SORT_2 init_16_arg_1 = var_4; [L136] state_15 = init_16_arg_1 [L137] SORT_2 init_18_arg_1 = var_4; [L138] state_17 = init_18_arg_1 [L139] SORT_2 init_20_arg_1 = var_4; [L140] state_19 = init_20_arg_1 [L141] SORT_2 init_22_arg_1 = var_4; [L142] state_21 = init_22_arg_1 [L143] SORT_2 init_24_arg_1 = var_4; [L144] state_23 = init_24_arg_1 [L145] SORT_1 init_27_arg_1 = var_25; [L146] state_26 = init_27_arg_1 [L147] SORT_1 init_29_arg_1 = var_25; [L148] state_28 = init_29_arg_1 [L149] SORT_1 init_31_arg_1 = var_25; [L150] state_30 = init_31_arg_1 [L151] SORT_1 init_33_arg_1 = var_25; [L152] state_32 = init_33_arg_1 [L153] SORT_1 init_35_arg_1 = var_25; [L154] state_34 = init_35_arg_1 [L155] SORT_1 init_37_arg_1 = var_25; [L156] state_36 = init_37_arg_1 [L157] SORT_1 init_39_arg_1 = var_25; [L158] state_38 = init_39_arg_1 [L159] SORT_1 init_41_arg_1 = var_25; [L160] state_40 = init_41_arg_1 [L161] SORT_1 init_43_arg_1 = var_25; [L162] state_42 = init_43_arg_1 [L163] SORT_1 init_45_arg_1 = var_25; [L164] state_44 = init_45_arg_1 [L165] SORT_1 init_47_arg_1 = var_25; [L166] state_46 = init_47_arg_1 [L167] SORT_1 init_49_arg_1 = var_25; [L168] state_48 = init_49_arg_1 [L169] SORT_1 init_51_arg_1 = var_25; [L170] state_50 = init_51_arg_1 [L171] SORT_1 init_53_arg_1 = var_25; [L172] state_52 = init_53_arg_1 [L173] SORT_1 init_55_arg_1 = var_25; [L174] state_54 = init_55_arg_1 [L175] SORT_1 init_57_arg_1 = var_25; [L176] state_56 = init_57_arg_1 [L177] SORT_1 init_59_arg_1 = var_25; [L178] state_58 = init_59_arg_1 [L179] SORT_1 init_61_arg_1 = var_25; [L180] state_60 = init_61_arg_1 [L181] SORT_1 init_63_arg_1 = var_25; [L182] state_62 = init_63_arg_1 [L183] SORT_1 init_65_arg_1 = var_25; [L184] state_64 = init_65_arg_1 [L185] SORT_1 init_67_arg_1 = var_25; [L186] state_66 = init_67_arg_1 [L187] SORT_1 init_69_arg_1 = var_25; [L188] state_68 = init_69_arg_1 [L189] SORT_1 init_71_arg_1 = var_25; [L190] state_70 = init_71_arg_1 [L191] SORT_1 init_73_arg_1 = var_25; [L192] state_72 = init_73_arg_1 [L193] SORT_1 init_75_arg_1 = var_25; [L194] state_74 = init_75_arg_1 [L195] SORT_1 init_77_arg_1 = var_25; [L196] state_76 = init_77_arg_1 [L197] SORT_1 init_79_arg_1 = var_25; [L198] state_78 = init_79_arg_1 [L199] SORT_1 init_81_arg_1 = var_25; [L200] state_80 = init_81_arg_1 [L201] SORT_1 init_83_arg_1 = var_25; [L202] state_82 = init_83_arg_1 [L203] SORT_1 init_85_arg_1 = var_25; [L204] state_84 = init_85_arg_1 [L205] SORT_1 init_87_arg_1 = var_25; [L206] state_86 = init_87_arg_1 VAL [init_10_arg_1=0, init_12_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_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_39_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_45_arg_1=0, init_47_arg_1=0, init_49_arg_1=0, init_51_arg_1=0, init_53_arg_1=0, init_55_arg_1=0, init_57_arg_1=0, init_59_arg_1=0, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_67_arg_1=0, init_69_arg_1=0, init_6_arg_1=0, init_71_arg_1=0, init_73_arg_1=0, init_75_arg_1=0, init_77_arg_1=0, init_79_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=2147483648, state_11=0, state_13=0, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_38=0, state_40=0, state_42=0, state_44=0, state_46=0, state_48=0, state_5=0, state_50=0, state_52=0, state_54=0, state_56=0, state_58=0, state_60=0, state_62=0, state_64=0, state_66=0, state_68=0, state_7=0, state_70=0, state_72=0, state_74=0, state_76=0, state_78=0, state_80=0, state_82=0, state_84=0, state_86=0, state_9=0, var_100=0, var_103=2, var_107=1, var_25=0, var_4=0, var_88=1, var_89=0, var_98=255] [L209] input_99 = __VERIFIER_nondet_uchar() [L210] input_104 = __VERIFIER_nondet_uchar() [L211] input_108 = __VERIFIER_nondet_uchar() [L212] input_111 = __VERIFIER_nondet_uchar() [L213] input_111 = input_111 & mask_SORT_1 [L214] input_123 = __VERIFIER_nondet_uchar() [L215] input_123 = input_123 & mask_SORT_1 [L216] input_135 = __VERIFIER_nondet_uchar() [L217] input_135 = input_135 & mask_SORT_1 [L218] input_147 = __VERIFIER_nondet_uchar() [L219] input_150 = __VERIFIER_nondet_uchar() [L220] input_153 = __VERIFIER_nondet_uchar() [L221] input_156 = __VERIFIER_nondet_uchar() [L222] input_156 = input_156 & mask_SORT_1 [L223] input_166 = __VERIFIER_nondet_uchar() [L224] input_166 = input_166 & mask_SORT_1 [L225] input_176 = __VERIFIER_nondet_uchar() [L226] input_176 = input_176 & mask_SORT_1 [L227] input_186 = __VERIFIER_nondet_uchar() [L228] input_186 = input_186 & mask_SORT_1 [L229] input_187 = __VERIFIER_nondet_uchar() [L230] input_187 = input_187 & mask_SORT_1 [L231] input_188 = __VERIFIER_nondet_uchar() [L232] input_188 = input_188 & mask_SORT_1 [L233] input_189 = __VERIFIER_nondet_uchar() [L234] input_189 = input_189 & mask_SORT_1 [L235] input_190 = __VERIFIER_nondet_uchar() [L236] input_190 = input_190 & mask_SORT_1 [L237] input_191 = __VERIFIER_nondet_uchar() [L238] input_191 = input_191 & mask_SORT_1 [L239] input_215 = __VERIFIER_nondet_uchar() [L240] input_217 = __VERIFIER_nondet_uchar() [L241] input_227 = __VERIFIER_nondet_uchar() [L242] input_232 = __VERIFIER_nondet_uchar() [L243] input_234 = __VERIFIER_nondet_uchar() [L244] input_239 = __VERIFIER_nondet_uchar() [L245] input_243 = __VERIFIER_nondet_uchar() [L246] input_258 = __VERIFIER_nondet_uchar() [L247] input_260 = __VERIFIER_nondet_uchar() [L248] input_270 = __VERIFIER_nondet_uchar() [L249] input_275 = __VERIFIER_nondet_uchar() [L250] input_277 = __VERIFIER_nondet_uchar() [L251] input_282 = __VERIFIER_nondet_uchar() [L252] input_286 = __VERIFIER_nondet_uchar() [L253] input_301 = __VERIFIER_nondet_uchar() [L254] input_303 = __VERIFIER_nondet_uchar() [L255] input_313 = __VERIFIER_nondet_uchar() [L256] input_318 = __VERIFIER_nondet_uchar() [L257] input_320 = __VERIFIER_nondet_uchar() [L258] input_325 = __VERIFIER_nondet_uchar() [L259] input_329 = __VERIFIER_nondet_uchar() [L262] SORT_1 var_90_arg_0 = state_38; [L263] SORT_3 var_90_arg_1 = var_88; [L264] SORT_3 var_90_arg_2 = var_89; [L265] EXPR var_90_arg_0 ? var_90_arg_1 : var_90_arg_2 [L265] SORT_3 var_90 = var_90_arg_0 ? var_90_arg_1 : var_90_arg_2; [L266] SORT_1 var_91_arg_0 = state_58; [L267] SORT_3 var_91_arg_1 = var_88; [L268] SORT_3 var_91_arg_2 = var_89; [L269] EXPR var_91_arg_0 ? var_91_arg_1 : var_91_arg_2 [L269] SORT_3 var_91 = var_91_arg_0 ? var_91_arg_1 : var_91_arg_2; [L270] SORT_3 var_92_arg_0 = var_90; [L271] SORT_3 var_92_arg_1 = var_91; [L272] SORT_3 var_92 = var_92_arg_0 + var_92_arg_1; [L273] SORT_1 var_93_arg_0 = state_78; [L274] SORT_3 var_93_arg_1 = var_88; [L275] SORT_3 var_93_arg_2 = var_89; [L276] EXPR var_93_arg_0 ? var_93_arg_1 : var_93_arg_2 [L276] SORT_3 var_93 = var_93_arg_0 ? var_93_arg_1 : var_93_arg_2; [L277] SORT_3 var_94_arg_0 = var_92; [L278] SORT_3 var_94_arg_1 = var_93; [L279] SORT_3 var_94 = var_94_arg_0 + var_94_arg_1; [L280] var_94 = var_94 & mask_SORT_3 [L281] SORT_3 var_95_arg_0 = var_94; [L282] SORT_3 var_95_arg_1 = var_88; [L283] SORT_1 var_95 = var_95_arg_0 <= var_95_arg_1; [L284] SORT_1 var_96_arg_0 = ~state_86; [L285] var_96_arg_0 = var_96_arg_0 & mask_SORT_1 [L286] SORT_1 var_96_arg_1 = ~var_95; [L287] var_96_arg_1 = var_96_arg_1 & mask_SORT_1 [L288] SORT_1 var_96 = var_96_arg_0 & var_96_arg_1; [L289] var_96 = var_96 & mask_SORT_1 [L290] SORT_1 bad_97_arg_0 = var_96; [L291] CALL __VERIFIER_assert(!(bad_97_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: 0.8s, 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 02:17:54,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/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_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/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_5a233025-d827-4677-b812-e51bd89e50d8/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 f8d951c4402488c95b1d9f665863df74bf845558698369360669f9c187af26b8 --- 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 02:17:56,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:17:56,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:17:56,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:17:56,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:17:56,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:17:56,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:17:56,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:17:56,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:17:56,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:17:56,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:17:56,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:17:56,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:17:56,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:17:56,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:17:56,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:17:56,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:17:56,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:17:56,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:17:56,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:17:56,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:17:56,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:17:56,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:17:56,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:17:56,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:17:56,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:17:56,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:17:56,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:17:56,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:17:56,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:17:56,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:17:56,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:17:56,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:17:56,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:17:56,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:17:56,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:17:56,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:17:56,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:17:56,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:17:56,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:17:56,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:17:56,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:17:56,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:17:56,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:17:56,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:17:56,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:17:56,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:17:56,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:17:56,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:17:56,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:17:56,818 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:17:56,819 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:17:56,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:17:56,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:17:56,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:17:56,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:17:56,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:17:56,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:17:56,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:17:56,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:17:56,821 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:17:56,821 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:17:56,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:17:56,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:17:56,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:17:56,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:17:56,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:17:56,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:17:56,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:56,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:17:56,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:17:56,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:17:56,824 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:17:56,824 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:56,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:17:56,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:17:56,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:17:56,825 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_5a233025-d827-4677-b812-e51bd89e50d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d951c4402488c95b1d9f665863df74bf845558698369360669f9c187af26b8 [2022-11-03 02:17:57,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:17:57,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:17:57,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:17:57,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:17:57,257 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:17:57,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:17:57,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/7c68fb75d/88f1c312e2aa42a399fc994354aa03bf/FLAG50426f4b4 [2022-11-03 02:17:58,096 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:17:58,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:17:58,117 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/7c68fb75d/88f1c312e2aa42a399fc994354aa03bf/FLAG50426f4b4 [2022-11-03 02:17:58,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/data/7c68fb75d/88f1c312e2aa42a399fc994354aa03bf [2022-11-03 02:17:58,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:17:58,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:17:58,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:58,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:17:58,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:17:58,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:58" (1/1) ... [2022-11-03 02:17:58,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ecc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:58, skipping insertion in model container [2022-11-03 02:17:58,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:17:58" (1/1) ... [2022-11-03 02:17:58,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:17:58,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:17:58,484 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_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:17:58,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:58,931 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:17:58,944 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_5a233025-d827-4677-b812-e51bd89e50d8/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mcs.1.prop1-func-interl.c[1014,1027] [2022-11-03 02:17:59,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:17:59,113 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:17:59,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59 WrapperNode [2022-11-03 02:17:59,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:17:59,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:59,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:17:59,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:17:59,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,321 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2410 [2022-11-03 02:17:59,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:17:59,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:17:59,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:17:59,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:17:59,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:17:59,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:17:59,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:17:59,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:17:59,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (1/1) ... [2022-11-03 02:17:59,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:17:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:59,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:17:59,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:17:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:17:59,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:18:00,229 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:18:00,231 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:04,009 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:04,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:04,017 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:18:04,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:04 BoogieIcfgContainer [2022-11-03 02:18:04,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:04,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:04,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:04,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:04,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:17:58" (1/3) ... [2022-11-03 02:18:04,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf38a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:04, skipping insertion in model container [2022-11-03 02:18:04,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:17:59" (2/3) ... [2022-11-03 02:18:04,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf38a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:04, skipping insertion in model container [2022-11-03 02:18:04,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:04" (3/3) ... [2022-11-03 02:18:04,028 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mcs.1.prop1-func-interl.c [2022-11-03 02:18:04,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:04,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:04,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:04,110 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;@754781f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:04,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 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 02:18:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:04,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:04,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:04,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 02:18:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:04,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912730717] [2022-11-03 02:18:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:04,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:04,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:04,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:18:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:04,810 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 02:18:04,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:04,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912730717] [2022-11-03 02:18:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912730717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:04,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:04,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28866110] [2022-11-03 02:18:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:04,896 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:05,321 INFO L93 Difference]: Finished difference Result 313 states and 467 transitions. [2022-11-03 02:18:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:18:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:05,333 INFO L225 Difference]: With dead ends: 313 [2022-11-03 02:18:05,334 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 02:18:05,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:05,340 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 331 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:05,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 445 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:18:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 02:18:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 81. [2022-11-03 02:18:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 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 02:18:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 117 transitions. [2022-11-03 02:18:05,398 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 117 transitions. Word has length 11 [2022-11-03 02:18:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:05,399 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 117 transitions. [2022-11-03 02:18:05,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 117 transitions. [2022-11-03 02:18:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:05,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:05,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:05,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:05,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:05,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 02:18:05,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:05,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185963787] [2022-11-03 02:18:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:05,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:05,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:18:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:06,123 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 02:18:06,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:06,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185963787] [2022-11-03 02:18:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185963787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:06,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:06,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214802904] [2022-11-03 02:18:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:06,127 INFO L87 Difference]: Start difference. First operand 81 states and 117 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:06,403 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2022-11-03 02:18:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:18:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:06,405 INFO L225 Difference]: With dead ends: 309 [2022-11-03 02:18:06,405 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 02:18:06,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:06,407 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 325 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:06,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 444 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 02:18:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 83. [2022-11-03 02:18:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 82 states have internal predecessors, (119), 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 02:18:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2022-11-03 02:18:06,418 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 11 [2022-11-03 02:18:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:06,418 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2022-11-03 02:18:06,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2022-11-03 02:18:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:06,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:06,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:06,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:06,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:06,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 02:18:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283186020] [2022-11-03 02:18:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:06,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:06,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:06,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:18:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:07,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:07,132 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 02:18:07,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:07,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:07,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283186020] [2022-11-03 02:18:07,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283186020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:07,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:07,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273071092] [2022-11-03 02:18:07,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:07,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:07,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:07,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:07,140 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:07,415 INFO L93 Difference]: Finished difference Result 309 states and 450 transitions. [2022-11-03 02:18:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:18:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:07,417 INFO L225 Difference]: With dead ends: 309 [2022-11-03 02:18:07,418 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 02:18:07,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:07,419 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 319 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:07,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 443 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 02:18:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 85. [2022-11-03 02:18:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 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 02:18:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-03 02:18:07,430 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 11 [2022-11-03 02:18:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-03 02:18:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-03 02:18:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:18:07,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:07,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:07,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:07,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:07,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 02:18:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:07,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440729130] [2022-11-03 02:18:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:07,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:07,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:07,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:07,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:18:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:08,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:18:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:08,445 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 02:18:08,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:08,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440729130] [2022-11-03 02:18:08,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440729130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:08,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:08,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:18:08,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320065521] [2022-11-03 02:18:08,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:08,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:18:08,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:08,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:18:08,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:18:08,448 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:09,808 INFO L93 Difference]: Finished difference Result 333 states and 481 transitions. [2022-11-03 02:18:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:18:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:18:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:09,811 INFO L225 Difference]: With dead ends: 333 [2022-11-03 02:18:09,811 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 02:18:09,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:18:09,813 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 982 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:09,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1021 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:18:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 02:18:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 91. [2022-11-03 02:18:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4333333333333333) internal successors, (129), 90 states have internal predecessors, (129), 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 02:18:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 129 transitions. [2022-11-03 02:18:09,823 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 129 transitions. Word has length 11 [2022-11-03 02:18:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:09,824 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 129 transitions. [2022-11-03 02:18:09,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 129 transitions. [2022-11-03 02:18:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:09,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:09,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:10,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1941024301, now seen corresponding path program 1 times [2022-11-03 02:18:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:10,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147693455] [2022-11-03 02:18:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:10,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:10,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:10,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:10,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:18:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:11,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:11,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147693455] [2022-11-03 02:18:11,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147693455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:11,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:11,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507597127] [2022-11-03 02:18:11,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:11,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:11,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:11,334 INFO L87 Difference]: Start difference. First operand 91 states and 129 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:18:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:11,635 INFO L93 Difference]: Finished difference Result 325 states and 471 transitions. [2022-11-03 02:18:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:11,637 INFO L225 Difference]: With dead ends: 325 [2022-11-03 02:18:11,637 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 02:18:11,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:18:11,639 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:11,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 398 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 02:18:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 103. [2022-11-03 02:18:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 102 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 02:18:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 145 transitions. [2022-11-03 02:18:11,647 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 145 transitions. Word has length 86 [2022-11-03 02:18:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:11,648 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 145 transitions. [2022-11-03 02:18:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:18:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 145 transitions. [2022-11-03 02:18:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:11,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:11,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:11,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:11,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:11,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash 724870575, now seen corresponding path program 1 times [2022-11-03 02:18:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232235609] [2022-11-03 02:18:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:11,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:11,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:18:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:13,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:13,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232235609] [2022-11-03 02:18:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232235609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:13,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:13,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727240610] [2022-11-03 02:18:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:13,025 INFO L87 Difference]: Start difference. First operand 103 states and 145 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:13,361 INFO L93 Difference]: Finished difference Result 350 states and 504 transitions. [2022-11-03 02:18:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:13,363 INFO L225 Difference]: With dead ends: 350 [2022-11-03 02:18:13,363 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:18:13,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:13,364 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 410 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:13,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 609 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:18:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 107. [2022-11-03 02:18:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 106 states have internal predecessors, (150), 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 02:18:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 150 transitions. [2022-11-03 02:18:13,371 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 150 transitions. Word has length 86 [2022-11-03 02:18:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:13,372 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 150 transitions. [2022-11-03 02:18:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 150 transitions. [2022-11-03 02:18:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:13,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:13,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:13,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:13,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:13,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash 307473969, now seen corresponding path program 1 times [2022-11-03 02:18:13,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762233016] [2022-11-03 02:18:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:13,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:13,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:13,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:13,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:18:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:14,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:14,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762233016] [2022-11-03 02:18:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762233016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:14,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:14,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:14,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365224864] [2022-11-03 02:18:14,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:14,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:14,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:14,751 INFO L87 Difference]: Start difference. First operand 107 states and 150 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:15,105 INFO L93 Difference]: Finished difference Result 350 states and 503 transitions. [2022-11-03 02:18:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:15,107 INFO L225 Difference]: With dead ends: 350 [2022-11-03 02:18:15,107 INFO L226 Difference]: Without dead ends: 267 [2022-11-03 02:18:15,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:15,108 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 403 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:15,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 603 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-03 02:18:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 109. [2022-11-03 02:18:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4074074074074074) internal successors, (152), 108 states have internal predecessors, (152), 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 02:18:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 152 transitions. [2022-11-03 02:18:15,123 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 152 transitions. Word has length 86 [2022-11-03 02:18:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 152 transitions. [2022-11-03 02:18:15,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 152 transitions. [2022-11-03 02:18:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:15,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:15,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:15,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:15,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2025918669, now seen corresponding path program 1 times [2022-11-03 02:18:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032170052] [2022-11-03 02:18:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:15,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:15,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:15,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:18:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:16,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:16,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032170052] [2022-11-03 02:18:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032170052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:16,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:16,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165336555] [2022-11-03 02:18:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:16,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:16,575 INFO L87 Difference]: Start difference. First operand 109 states and 152 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:18:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:16,855 INFO L93 Difference]: Finished difference Result 325 states and 468 transitions. [2022-11-03 02:18:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:16,857 INFO L225 Difference]: With dead ends: 325 [2022-11-03 02:18:16,857 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 02:18:16,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:18:16,858 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 262 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:16,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 401 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:18:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 02:18:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 111. [2022-11-03 02:18:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4) internal successors, (154), 110 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 02:18:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2022-11-03 02:18:16,864 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 86 [2022-11-03 02:18:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:16,865 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2022-11-03 02:18:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:18:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2022-11-03 02:18:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:16,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:16,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:16,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:17,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:17,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1465218891, now seen corresponding path program 1 times [2022-11-03 02:18:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:17,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514412140] [2022-11-03 02:18:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:17,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:17,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:17,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:18:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:18,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:18,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514412140] [2022-11-03 02:18:18,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514412140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:18,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:18,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866604155] [2022-11-03 02:18:18,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:18,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:18,296 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:18,599 INFO L93 Difference]: Finished difference Result 358 states and 513 transitions. [2022-11-03 02:18:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:18,601 INFO L225 Difference]: With dead ends: 358 [2022-11-03 02:18:18,601 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 02:18:18,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:18,603 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 404 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:18,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 611 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 02:18:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 113. [2022-11-03 02:18:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 112 states have internal predecessors, (156), 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 02:18:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2022-11-03 02:18:18,608 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 156 transitions. Word has length 86 [2022-11-03 02:18:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:18,608 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 156 transitions. [2022-11-03 02:18:18,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 156 transitions. [2022-11-03 02:18:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:18,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:18,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:18,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:18,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash -204301641, now seen corresponding path program 1 times [2022-11-03 02:18:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:18,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99779596] [2022-11-03 02:18:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:18,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:18,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:18:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:18:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:19,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:19,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:19,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99779596] [2022-11-03 02:18:19,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99779596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:19,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:19,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734222454] [2022-11-03 02:18:19,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:19,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:19,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:19,894 INFO L87 Difference]: Start difference. First operand 113 states and 156 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:20,196 INFO L93 Difference]: Finished difference Result 358 states and 512 transitions. [2022-11-03 02:18:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:20,198 INFO L225 Difference]: With dead ends: 358 [2022-11-03 02:18:20,198 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 02:18:20,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:20,199 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 392 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:20,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 606 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:18:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 02:18:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 117. [2022-11-03 02:18:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 116 states have internal predecessors, (161), 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 02:18:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2022-11-03 02:18:20,205 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 86 [2022-11-03 02:18:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:20,206 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2022-11-03 02:18:20,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2022-11-03 02:18:20,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:20,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:20,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:20,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:20,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash 239599033, now seen corresponding path program 1 times [2022-11-03 02:18:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612040969] [2022-11-03 02:18:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:20,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:20,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:18:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:21,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:21,700 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612040969] [2022-11-03 02:18:21,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612040969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:21,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:21,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:18:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924950148] [2022-11-03 02:18:21,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:21,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:18:21,704 INFO L87 Difference]: Start difference. First operand 117 states and 161 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:22,297 INFO L93 Difference]: Finished difference Result 366 states and 523 transitions. [2022-11-03 02:18:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:22,299 INFO L225 Difference]: With dead ends: 366 [2022-11-03 02:18:22,299 INFO L226 Difference]: Without dead ends: 283 [2022-11-03 02:18:22,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:18:22,300 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 498 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:22,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 725 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-03 02:18:22,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 121. [2022-11-03 02:18:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 120 states have internal predecessors, (166), 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 02:18:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2022-11-03 02:18:22,307 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 86 [2022-11-03 02:18:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:22,307 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2022-11-03 02:18:22,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2022-11-03 02:18:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:22,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:22,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:22,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:22,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:22,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash 224080315, now seen corresponding path program 1 times [2022-11-03 02:18:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:22,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328046522] [2022-11-03 02:18:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:22,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:22,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:22,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:18:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:23,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:23,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:23,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328046522] [2022-11-03 02:18:23,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328046522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:23,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:23,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:18:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772743267] [2022-11-03 02:18:23,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:18:23,862 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:24,440 INFO L93 Difference]: Finished difference Result 366 states and 522 transitions. [2022-11-03 02:18:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:24,442 INFO L225 Difference]: With dead ends: 366 [2022-11-03 02:18:24,442 INFO L226 Difference]: Without dead ends: 283 [2022-11-03 02:18:24,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:18:24,443 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 488 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:24,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 731 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-03 02:18:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 125. [2022-11-03 02:18:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 124 states have internal predecessors, (171), 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 02:18:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2022-11-03 02:18:24,450 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 86 [2022-11-03 02:18:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:24,450 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2022-11-03 02:18:24,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2022-11-03 02:18:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:24,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:24,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:24,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:24,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:24,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1117566653, now seen corresponding path program 1 times [2022-11-03 02:18:24,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:24,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923305220] [2022-11-03 02:18:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:24,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:24,664 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:18:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:25,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:25,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:25,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923305220] [2022-11-03 02:18:25,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923305220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:25,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:25,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448177228] [2022-11-03 02:18:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:25,891 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:26,499 INFO L93 Difference]: Finished difference Result 342 states and 485 transitions. [2022-11-03 02:18:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:26,501 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:18:26,501 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 02:18:26,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:26,502 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 333 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:26,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 517 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 02:18:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 127. [2022-11-03 02:18:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.373015873015873) internal successors, (173), 126 states have internal predecessors, (173), 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 02:18:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 173 transitions. [2022-11-03 02:18:26,507 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 173 transitions. Word has length 86 [2022-11-03 02:18:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:26,508 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 173 transitions. [2022-11-03 02:18:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 173 transitions. [2022-11-03 02:18:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:26,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:26,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:26,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:26,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:26,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 220173375, now seen corresponding path program 1 times [2022-11-03 02:18:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198416919] [2022-11-03 02:18:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:26,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:26,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:18:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:28,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:28,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:28,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198416919] [2022-11-03 02:18:28,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198416919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:28,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:28,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:18:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410074964] [2022-11-03 02:18:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:28,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:18:28,064 INFO L87 Difference]: Start difference. First operand 127 states and 173 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:28,690 INFO L93 Difference]: Finished difference Result 374 states and 532 transitions. [2022-11-03 02:18:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:28,692 INFO L225 Difference]: With dead ends: 374 [2022-11-03 02:18:28,692 INFO L226 Difference]: Without dead ends: 291 [2022-11-03 02:18:28,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:18:28,693 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 478 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:28,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 722 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-03 02:18:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 131. [2022-11-03 02:18:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3692307692307693) internal successors, (178), 130 states have internal predecessors, (178), 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 02:18:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-11-03 02:18:28,702 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 86 [2022-11-03 02:18:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:28,702 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-11-03 02:18:28,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-11-03 02:18:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:28,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:28,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:28,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:28,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1625193791, now seen corresponding path program 1 times [2022-11-03 02:18:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138226993] [2022-11-03 02:18:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:28,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:28,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:28,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:18:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:30,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:30,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138226993] [2022-11-03 02:18:30,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138226993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:30,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:30,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:18:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479865666] [2022-11-03 02:18:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:30,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:18:30,262 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:30,878 INFO L93 Difference]: Finished difference Result 374 states and 531 transitions. [2022-11-03 02:18:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:30,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:30,883 INFO L225 Difference]: With dead ends: 374 [2022-11-03 02:18:30,883 INFO L226 Difference]: Without dead ends: 291 [2022-11-03 02:18:30,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:18:30,884 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 473 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 722 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-03 02:18:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 133. [2022-11-03 02:18:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 132 states have internal predecessors, (180), 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 02:18:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 180 transitions. [2022-11-03 02:18:30,891 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 180 transitions. Word has length 86 [2022-11-03 02:18:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:30,891 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 180 transitions. [2022-11-03 02:18:30,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 180 transitions. [2022-11-03 02:18:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:30,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:30,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:30,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:31,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:31,106 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:31,106 INFO L85 PathProgramCache]: Analyzing trace with hash -965662269, now seen corresponding path program 1 times [2022-11-03 02:18:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:31,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298455226] [2022-11-03 02:18:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:31,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:31,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:31,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:31,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:18:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:32,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:32,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298455226] [2022-11-03 02:18:32,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298455226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:32,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:32,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:18:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015216695] [2022-11-03 02:18:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:32,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:32,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:18:32,389 INFO L87 Difference]: Start difference. First operand 133 states and 180 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:32,925 INFO L93 Difference]: Finished difference Result 342 states and 482 transitions. [2022-11-03 02:18:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:18:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:32,928 INFO L225 Difference]: With dead ends: 342 [2022-11-03 02:18:32,929 INFO L226 Difference]: Without dead ends: 259 [2022-11-03 02:18:32,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:32,930 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 307 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:32,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 513 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-03 02:18:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 135. [2022-11-03 02:18:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3582089552238805) internal successors, (182), 134 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:18:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2022-11-03 02:18:32,942 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 86 [2022-11-03 02:18:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:32,942 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2022-11-03 02:18:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:18:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2022-11-03 02:18:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:32,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:32,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:32,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:33,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:33,158 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1809667771, now seen corresponding path program 1 times [2022-11-03 02:18:33,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:33,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019652375] [2022-11-03 02:18:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:33,164 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:33,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:18:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:34,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:34,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:34,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019652375] [2022-11-03 02:18:34,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019652375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:34,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:34,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:18:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481973588] [2022-11-03 02:18:34,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:34,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:18:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:18:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:18:34,579 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:35,167 INFO L93 Difference]: Finished difference Result 382 states and 541 transitions. [2022-11-03 02:18:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:18:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:35,169 INFO L225 Difference]: With dead ends: 382 [2022-11-03 02:18:35,169 INFO L226 Difference]: Without dead ends: 299 [2022-11-03 02:18:35,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:18:35,170 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 462 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:35,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 717 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:18:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-03 02:18:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 141. [2022-11-03 02:18:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3571428571428572) internal successors, (190), 140 states have internal predecessors, (190), 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 02:18:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2022-11-03 02:18:35,177 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 86 [2022-11-03 02:18:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:35,178 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2022-11-03 02:18:35,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:18:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2022-11-03 02:18:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:35,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:35,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:35,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,379 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash -423464377, now seen corresponding path program 1 times [2022-11-03 02:18:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:35,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682805540] [2022-11-03 02:18:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:35,383 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:18:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:36,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:18:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:36,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:36,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682805540] [2022-11-03 02:18:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682805540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:36,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:36,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:18:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98746681] [2022-11-03 02:18:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:18:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:18:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:18:36,607 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 02:18:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:36,852 INFO L93 Difference]: Finished difference Result 238 states and 332 transitions. [2022-11-03 02:18:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 86 [2022-11-03 02:18:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:36,853 INFO L225 Difference]: With dead ends: 238 [2022-11-03 02:18:36,853 INFO L226 Difference]: Without dead ends: 155 [2022-11-03 02:18:36,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:36,854 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 32 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:36,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 633 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-03 02:18:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-03 02:18:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-11-03 02:18:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3636363636363635) internal successors, (210), 154 states have internal predecessors, (210), 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 02:18:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2022-11-03 02:18:36,861 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 86 [2022-11-03 02:18:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:36,861 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2022-11-03 02:18:36,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 02:18:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2022-11-03 02:18:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:18:36,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:36,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:36,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:37,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:37,078 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 856399301, now seen corresponding path program 1 times [2022-11-03 02:18:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045172763] [2022-11-03 02:18:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [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_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:37,081 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:37,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:18:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:18:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:39,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:49,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045172763] [2022-11-03 02:18:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045172763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208054604] [2022-11-03 02:18:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:49,029 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:49,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:49,031 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:49,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:18:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:18:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:51,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1208054604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048568080] [2022-11-03 02:19:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:03,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:03,170 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:03,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:19:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:19:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:05,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:17,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048568080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:17,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:17,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 25 [2022-11-03 02:19:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403485239] [2022-11-03 02:19:17,459 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:19:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:19:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=492, Unknown=14, NotChecked=0, Total=600 [2022-11-03 02:19:17,461 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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 02:19:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:17,941 INFO L93 Difference]: Finished difference Result 251 states and 336 transitions. [2022-11-03 02:19:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:19:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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 86 [2022-11-03 02:19:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:17,944 INFO L225 Difference]: With dead ends: 251 [2022-11-03 02:19:17,944 INFO L226 Difference]: Without dead ends: 249 [2022-11-03 02:19:17,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 488 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=208, Invalid=834, Unknown=14, NotChecked=0, Total=1056 [2022-11-03 02:19:17,945 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 562 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:17,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1826 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-11-03 02:19:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-03 02:19:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2022-11-03 02:19:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 231 states have internal predecessors, (311), 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 02:19:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2022-11-03 02:19:17,955 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 86 [2022-11-03 02:19:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:17,955 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2022-11-03 02:19:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 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 02:19:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2022-11-03 02:19:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:19:17,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:17,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:17,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:18,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:18,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 02:19:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:19:18,571 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -731948601, now seen corresponding path program 1 times [2022-11-03 02:19:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:18,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708531324] [2022-11-03 02:19:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:18,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:18,574 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:18,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:19:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:19:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:20,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:28,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708531324] [2022-11-03 02:19:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708531324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1598374183] [2022-11-03 02:19:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:28,139 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:28,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:28,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:28,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:19:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:19:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:30,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1598374183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672080272] [2022-11-03 02:19:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:40,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:40,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:19:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:19:40,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:42,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672080272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:10,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:20:10,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 02:20:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186064613] [2022-11-03 02:20:10,856 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:20:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:20:10,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:20:10,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=767, Unknown=15, NotChecked=0, Total=930 [2022-11-03 02:20:10,861 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 31 states, 31 states have (on average 10.709677419354838) internal successors, (332), 31 states have internal predecessors, (332), 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 02:20:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:11,651 INFO L93 Difference]: Finished difference Result 363 states and 500 transitions. [2022-11-03 02:20:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:20:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 10.709677419354838) internal successors, (332), 31 states have internal predecessors, (332), 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 86 [2022-11-03 02:20:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:11,654 INFO L225 Difference]: With dead ends: 363 [2022-11-03 02:20:11,654 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:20:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 482 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=283, Invalid=1262, Unknown=15, NotChecked=0, Total=1560 [2022-11-03 02:20:11,655 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 913 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 2146 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-11-03 02:20:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:20:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 323. [2022-11-03 02:20:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.3788819875776397) internal successors, (444), 322 states have internal predecessors, (444), 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 02:20:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 444 transitions. [2022-11-03 02:20:11,668 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 444 transitions. Word has length 86 [2022-11-03 02:20:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:11,669 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 444 transitions. [2022-11-03 02:20:11,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 10.709677419354838) internal successors, (332), 31 states have internal predecessors, (332), 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 02:20:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 444 transitions. [2022-11-03 02:20:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:20:11,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:11,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:11,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:11,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:12,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:12,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:20:12,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -30348727, now seen corresponding path program 1 times [2022-11-03 02:20:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:12,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420748477] [2022-11-03 02:20:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:12,286 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:12,287 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:12,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:20:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:20:13,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:21,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:21,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420748477] [2022-11-03 02:20:21,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420748477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:21,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966774288] [2022-11-03 02:20:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:21,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:21,621 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:21,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:20:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:20:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:23,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:35,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966774288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:35,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249429136] [2022-11-03 02:20:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:35,348 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:20:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:20:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:36,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:12,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249429136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:12,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:12,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 19 [2022-11-03 02:21:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110604595] [2022-11-03 02:21:12,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:12,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:21:12,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:21:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=241, Unknown=23, NotChecked=0, Total=342 [2022-11-03 02:21:12,841 INFO L87 Difference]: Start difference. First operand 323 states and 444 transitions. Second operand has 19 states, 19 states have (on average 10.105263157894736) internal successors, (192), 19 states have internal predecessors, (192), 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 02:21:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:12,991 INFO L93 Difference]: Finished difference Result 387 states and 533 transitions. [2022-11-03 02:21:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:21:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.105263157894736) internal successors, (192), 19 states have internal predecessors, (192), 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 86 [2022-11-03 02:21:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:12,996 INFO L225 Difference]: With dead ends: 387 [2022-11-03 02:21:12,996 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:21:12,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 489 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 52.0s TimeCoverageRelationStatistics Valid=103, Invalid=294, Unknown=23, NotChecked=0, Total=420 [2022-11-03 02:21:12,997 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 366 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:12,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1497 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-11-03 02:21:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:21:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 323. [2022-11-03 02:21:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.3788819875776397) internal successors, (444), 322 states have internal predecessors, (444), 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 02:21:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 444 transitions. [2022-11-03 02:21:13,011 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 444 transitions. Word has length 86 [2022-11-03 02:21:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:13,012 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 444 transitions. [2022-11-03 02:21:13,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.105263157894736) internal successors, (192), 19 states have internal predecessors, (192), 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 02:21:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 444 transitions. [2022-11-03 02:21:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:21:13,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:13,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:13,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:13,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:13,628 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 363773127, now seen corresponding path program 1 times [2022-11-03 02:21:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955771144] [2022-11-03 02:21:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:13,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:13,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:13,631 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:21:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:21:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:15,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:23,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955771144] [2022-11-03 02:21:23,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955771144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482113229] [2022-11-03 02:21:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:23,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:23,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:23,354 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:21:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:21:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482113229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:27,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117097537] [2022-11-03 02:21:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:27,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:27,197 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:27,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:21:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:27,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:21:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:29,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:33,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117097537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:33,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:21:33,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 24 [2022-11-03 02:21:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150573494] [2022-11-03 02:21:33,431 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:33,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:21:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:21:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:21:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=457, Unknown=4, NotChecked=0, Total=552 [2022-11-03 02:21:33,433 INFO L87 Difference]: Start difference. First operand 323 states and 444 transitions. Second operand has 24 states, 24 states have (on average 13.416666666666666) internal successors, (322), 24 states have internal predecessors, (322), 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 02:21:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:33,895 INFO L93 Difference]: Finished difference Result 526 states and 739 transitions. [2022-11-03 02:21:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:21:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 13.416666666666666) internal successors, (322), 24 states have internal predecessors, (322), 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 86 [2022-11-03 02:21:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:33,898 INFO L225 Difference]: With dead ends: 526 [2022-11-03 02:21:33,898 INFO L226 Difference]: Without dead ends: 524 [2022-11-03 02:21:33,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 487 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=193, Invalid=733, Unknown=4, NotChecked=0, Total=930 [2022-11-03 02:21:33,899 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 505 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:33,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 2294 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 102 Unchecked, 0.0s Time] [2022-11-03 02:21:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-03 02:21:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 347. [2022-11-03 02:21:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.384393063583815) internal successors, (479), 346 states have internal predecessors, (479), 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 02:21:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 479 transitions. [2022-11-03 02:21:33,914 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 479 transitions. Word has length 86 [2022-11-03 02:21:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:33,914 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 479 transitions. [2022-11-03 02:21:33,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.416666666666666) internal successors, (322), 24 states have internal predecessors, (322), 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 02:21:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 479 transitions. [2022-11-03 02:21:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:21:33,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:33,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:33,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:34,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:34,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 02:21:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:34,530 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1224574775, now seen corresponding path program 1 times [2022-11-03 02:21:34,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:21:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605607777] [2022-11-03 02:21:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:21:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:21:34,533 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:21:34,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:21:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:21:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:36,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:44,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:21:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605607777] [2022-11-03 02:21:44,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605607777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460674422] [2022-11-03 02:21:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:44,122 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:21:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:21:44,123 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:21:44,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:21:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:21:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:46,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:47,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460674422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020244060] [2022-11-03 02:21:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:47,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:47,924 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:47,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a233025-d827-4677-b812-e51bd89e50d8/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:21:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:21:48,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:56,579 INFO L328 TraceCheckSpWp]: Computing backward predicates...