./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f9f68a3a1240fc969efb46a01cb5f627c0ce9dd351fdfdef3544b10231a4d97 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:27:11,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:27:11,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:27:11,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:27:11,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:27:11,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:27:11,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:27:11,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:27:11,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:27:11,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:27:11,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:27:11,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:27:11,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:27:11,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:27:11,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:27:11,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:27:11,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:27:11,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:27:11,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:27:11,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:27:11,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:27:11,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:27:11,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:27:11,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:27:11,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:27:11,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:27:11,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:27:11,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:27:11,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:27:11,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:27:11,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:27:11,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:27:11,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:27:11,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:27:11,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:27:11,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:27:11,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:27:11,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:27:11,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:27:11,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:27:11,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:27:11,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:27:11,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:27:11,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:27:11,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:27:11,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:27:11,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:27:11,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:27:11,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:27:11,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:27:11,212 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:27:11,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:27:11,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:27:11,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:27:11,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:27:11,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:27:11,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:27:11,216 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_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f9f68a3a1240fc969efb46a01cb5f627c0ce9dd351fdfdef3544b10231a4d97 [2021-12-06 17:27:11,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:27:11,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:27:11,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:27:11,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:27:11,420 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:27:11,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem12_label02.c [2021-12-06 17:27:11,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/data/8b0b7f7d4/d1f388f2359a495b8b88afaf2a4a1263/FLAG48eeb250b [2021-12-06 17:27:12,080 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:27:12,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/sv-benchmarks/c/eca-rers2012/Problem12_label02.c [2021-12-06 17:27:12,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/data/8b0b7f7d4/d1f388f2359a495b8b88afaf2a4a1263/FLAG48eeb250b [2021-12-06 17:27:12,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/data/8b0b7f7d4/d1f388f2359a495b8b88afaf2a4a1263 [2021-12-06 17:27:12,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:27:12,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:27:12,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:12,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:27:12,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:27:12,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:12" (1/1) ... [2021-12-06 17:27:12,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d4dd87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:12, skipping insertion in model container [2021-12-06 17:27:12,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:27:12" (1/1) ... [2021-12-06 17:27:12,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:27:12,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:27:12,509 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_2896c55e-316b-476a-998d-af9b134cb8d2/sv-benchmarks/c/eca-rers2012/Problem12_label02.c[7651,7664] [2021-12-06 17:27:13,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:13,074 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:27:13,095 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_2896c55e-316b-476a-998d-af9b134cb8d2/sv-benchmarks/c/eca-rers2012/Problem12_label02.c[7651,7664] [2021-12-06 17:27:13,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:27:13,481 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:27:13,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13 WrapperNode [2021-12-06 17:27:13,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:27:13,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:13,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:27:13,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:27:13,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,723 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-06 17:27:13,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:27:13,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:27:13,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:27:13,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:27:13,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:13,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:27:13,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:27:13,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:27:13,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:27:13,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (1/1) ... [2021-12-06 17:27:14,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:27:14,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:14,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:27:14,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:27:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:27:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:27:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:27:14,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:27:14,116 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:27:14,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:27:16,889 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:27:16,904 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:27:16,904 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:27:16,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:16 BoogieIcfgContainer [2021-12-06 17:27:16,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:27:16,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:27:16,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:27:16,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:27:16,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:27:12" (1/3) ... [2021-12-06 17:27:16,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785e550c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:16, skipping insertion in model container [2021-12-06 17:27:16,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:27:13" (2/3) ... [2021-12-06 17:27:16,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785e550c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:27:16, skipping insertion in model container [2021-12-06 17:27:16,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:27:16" (3/3) ... [2021-12-06 17:27:16,915 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label02.c [2021-12-06 17:27:16,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:27:16,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:27:16,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:27:16,963 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:27:16,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:27:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:27:16,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:16,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:16,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2021-12-06 17:27:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968130123] [2021-12-06 17:27:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:17,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:17,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:17,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968130123] [2021-12-06 17:27:17,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968130123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:17,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:17,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170445751] [2021-12-06 17:27:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:17,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:17,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:17,230 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:19,987 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-12-06 17:27:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-06 17:27:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:20,013 INFO L225 Difference]: With dead ends: 2404 [2021-12-06 17:27:20,013 INFO L226 Difference]: Without dead ends: 1506 [2021-12-06 17:27:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:20,021 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 758 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:20,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 17:27:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-06 17:27:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-06 17:27:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-12-06 17:27:20,104 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 62 [2021-12-06 17:27:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:20,104 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-12-06 17:27:20,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-12-06 17:27:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 17:27:20,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:20,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:20,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:27:20,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 158284175, now seen corresponding path program 1 times [2021-12-06 17:27:20,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:20,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704692645] [2021-12-06 17:27:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:20,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:20,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704692645] [2021-12-06 17:27:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704692645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:20,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:20,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:27:20,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647999653] [2021-12-06 17:27:20,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:20,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:20,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:20,215 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:22,414 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2021-12-06 17:27:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-12-06 17:27:22,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:22,428 INFO L225 Difference]: With dead ends: 4512 [2021-12-06 17:27:22,428 INFO L226 Difference]: Without dead ends: 3008 [2021-12-06 17:27:22,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:22,431 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:22,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:27:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-06 17:27:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-06 17:27:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2021-12-06 17:27:22,486 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 137 [2021-12-06 17:27:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:22,487 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2021-12-06 17:27:22,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2021-12-06 17:27:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 17:27:22,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:22,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:22,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:27:22,491 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1924184374, now seen corresponding path program 1 times [2021-12-06 17:27:22,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:22,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001602487] [2021-12-06 17:27:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:22,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:22,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:22,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001602487] [2021-12-06 17:27:22,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001602487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:22,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:22,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:22,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908894938] [2021-12-06 17:27:22,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:22,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:27:22,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:27:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:27:22,600 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:26,088 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2021-12-06 17:27:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:27:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-12-06 17:27:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:26,115 INFO L225 Difference]: With dead ends: 9769 [2021-12-06 17:27:26,115 INFO L226 Difference]: Without dead ends: 6763 [2021-12-06 17:27:26,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:26,119 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2180 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:26,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 166 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 17:27:26,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-12-06 17:27:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-12-06 17:27:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3507837917775807) internal successors, (9134), 6762 states have internal predecessors, (9134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9134 transitions. [2021-12-06 17:27:26,230 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9134 transitions. Word has length 139 [2021-12-06 17:27:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:26,230 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9134 transitions. [2021-12-06 17:27:26,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9134 transitions. [2021-12-06 17:27:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 17:27:26,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:26,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:26,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:27:26,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1063433376, now seen corresponding path program 1 times [2021-12-06 17:27:26,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:26,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597528976] [2021-12-06 17:27:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:26,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:27:26,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597528976] [2021-12-06 17:27:26,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597528976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026313947] [2021-12-06 17:27:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:26,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:26,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:26,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:27:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:27:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-06 17:27:26,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:27:26,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026313947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:26,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:27:26,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 17:27:26,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773148517] [2021-12-06 17:27:26,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:26,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:26,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:26,726 INFO L87 Difference]: Start difference. First operand 6763 states and 9134 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:28,701 INFO L93 Difference]: Finished difference Result 15777 states and 21144 transitions. [2021-12-06 17:27:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 207 [2021-12-06 17:27:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:28,734 INFO L225 Difference]: With dead ends: 15777 [2021-12-06 17:27:28,734 INFO L226 Difference]: Without dead ends: 9767 [2021-12-06 17:27:28,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:27:28,740 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 712 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:28,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:27:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-06 17:27:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-06 17:27:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2556829817734998) internal successors, (12263), 9766 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12263 transitions. [2021-12-06 17:27:28,874 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12263 transitions. Word has length 207 [2021-12-06 17:27:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:28,875 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12263 transitions. [2021-12-06 17:27:28,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12263 transitions. [2021-12-06 17:27:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-06 17:27:28,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:28,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:28,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:27:29,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:29,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2118553831, now seen corresponding path program 1 times [2021-12-06 17:27:29,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:29,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378760887] [2021-12-06 17:27:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:29,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 17:27:29,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378760887] [2021-12-06 17:27:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378760887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:29,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:29,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:29,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295562101] [2021-12-06 17:27:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:29,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:27:29,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:27:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:27:29,210 INFO L87 Difference]: Start difference. First operand 9767 states and 12263 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:32,168 INFO L93 Difference]: Finished difference Result 27118 states and 34546 transitions. [2021-12-06 17:27:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:27:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 274 [2021-12-06 17:27:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:32,207 INFO L225 Difference]: With dead ends: 27118 [2021-12-06 17:27:32,207 INFO L226 Difference]: Without dead ends: 18030 [2021-12-06 17:27:32,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:27:32,214 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3717 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 4343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 3717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:32,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 365 Invalid, 4343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 3717 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 17:27:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18030 states. [2021-12-06 17:27:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18030 to 15775. [2021-12-06 17:27:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.1934195511601369) internal successors, (18825), 15774 states have internal predecessors, (18825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18825 transitions. [2021-12-06 17:27:32,396 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18825 transitions. Word has length 274 [2021-12-06 17:27:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:32,396 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 18825 transitions. [2021-12-06 17:27:32,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18825 transitions. [2021-12-06 17:27:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-06 17:27:32,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:32,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:32,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:27:32,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:32,403 INFO L85 PathProgramCache]: Analyzing trace with hash -797031540, now seen corresponding path program 1 times [2021-12-06 17:27:32,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:32,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472322571] [2021-12-06 17:27:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:32,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 17:27:32,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:32,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472322571] [2021-12-06 17:27:32,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472322571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:32,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:32,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:32,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823318138] [2021-12-06 17:27:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:32,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:32,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:32,517 INFO L87 Difference]: Start difference. First operand 15775 states and 18825 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:34,816 INFO L93 Difference]: Finished difference Result 39058 states and 47478 transitions. [2021-12-06 17:27:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 385 [2021-12-06 17:27:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:34,844 INFO L225 Difference]: With dead ends: 39058 [2021-12-06 17:27:34,844 INFO L226 Difference]: Without dead ends: 24036 [2021-12-06 17:27:34,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:34,855 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 695 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:34,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 428 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:27:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2021-12-06 17:27:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 24036. [2021-12-06 17:27:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.182275847722072) internal successors, (28416), 24035 states have internal predecessors, (28416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28416 transitions. [2021-12-06 17:27:35,111 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28416 transitions. Word has length 385 [2021-12-06 17:27:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:35,111 INFO L470 AbstractCegarLoop]: Abstraction has 24036 states and 28416 transitions. [2021-12-06 17:27:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28416 transitions. [2021-12-06 17:27:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-12-06 17:27:35,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:35,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:35,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:27:35,119 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1789129640, now seen corresponding path program 1 times [2021-12-06 17:27:35,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809922559] [2021-12-06 17:27:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:35,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 17:27:35,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:35,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809922559] [2021-12-06 17:27:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809922559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:35,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:35,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:35,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488228408] [2021-12-06 17:27:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:35,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:35,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:35,234 INFO L87 Difference]: Start difference. First operand 24036 states and 28416 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:37,292 INFO L93 Difference]: Finished difference Result 56331 states and 68010 transitions. [2021-12-06 17:27:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2021-12-06 17:27:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:37,328 INFO L225 Difference]: With dead ends: 56331 [2021-12-06 17:27:37,328 INFO L226 Difference]: Without dead ends: 33048 [2021-12-06 17:27:37,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:37,344 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:37,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1216 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:27:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33048 states. [2021-12-06 17:27:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33048 to 30795. [2021-12-06 17:27:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30795 states, 30794 states have (on average 1.1705851789309605) internal successors, (36047), 30794 states have internal predecessors, (36047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30795 states to 30795 states and 36047 transitions. [2021-12-06 17:27:37,733 INFO L78 Accepts]: Start accepts. Automaton has 30795 states and 36047 transitions. Word has length 396 [2021-12-06 17:27:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:37,734 INFO L470 AbstractCegarLoop]: Abstraction has 30795 states and 36047 transitions. [2021-12-06 17:27:37,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30795 states and 36047 transitions. [2021-12-06 17:27:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-06 17:27:37,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:37,738 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:37,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:27:37,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1548462628, now seen corresponding path program 1 times [2021-12-06 17:27:37,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101538694] [2021-12-06 17:27:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:37,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 17:27:37,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101538694] [2021-12-06 17:27:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101538694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:27:37,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:27:37,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:27:37,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252772129] [2021-12-06 17:27:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:27:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:27:37,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:27:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:37,855 INFO L87 Difference]: Start difference. First operand 30795 states and 36047 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:27:40,243 INFO L93 Difference]: Finished difference Result 69849 states and 83272 transitions. [2021-12-06 17:27:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:27:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 417 [2021-12-06 17:27:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:27:40,292 INFO L225 Difference]: With dead ends: 69849 [2021-12-06 17:27:40,292 INFO L226 Difference]: Without dead ends: 39807 [2021-12-06 17:27:40,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:27:40,305 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 673 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:27:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 1285 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:27:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2021-12-06 17:27:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 39807. [2021-12-06 17:27:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39807 states, 39806 states have (on average 1.1525146962769433) internal successors, (45877), 39806 states have internal predecessors, (45877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 45877 transitions. [2021-12-06 17:27:40,689 INFO L78 Accepts]: Start accepts. Automaton has 39807 states and 45877 transitions. Word has length 417 [2021-12-06 17:27:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:27:40,690 INFO L470 AbstractCegarLoop]: Abstraction has 39807 states and 45877 transitions. [2021-12-06 17:27:40,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:27:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 39807 states and 45877 transitions. [2021-12-06 17:27:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-06 17:27:40,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:27:40,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:27:40,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:27:40,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:27:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:27:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash -405541038, now seen corresponding path program 1 times [2021-12-06 17:27:40,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:27:40,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25962774] [2021-12-06 17:27:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:40,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:27:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 452 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:27:40,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:27:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25962774] [2021-12-06 17:27:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25962774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:27:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574251024] [2021-12-06 17:27:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:27:40,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:27:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:27:40,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:27:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:27:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:27:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:27:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:27:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 312 proven. 60 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 17:27:41,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:27:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 312 proven. 60 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 17:27:41,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574251024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:27:41,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:27:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 11 [2021-12-06 17:27:41,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924978756] [2021-12-06 17:27:41,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:27:41,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:27:41,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:27:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:27:41,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:27:41,990 INFO L87 Difference]: Start difference. First operand 39807 states and 45877 transitions. Second operand has 11 states, 11 states have (on average 80.36363636363636) internal successors, (884), 11 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:02,164 INFO L93 Difference]: Finished difference Result 171236 states and 194891 transitions. [2021-12-06 17:28:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 17:28:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 80.36363636363636) internal successors, (884), 11 states have internal predecessors, (884), 0 states have call successors, (0), 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 421 [2021-12-06 17:28:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:02,298 INFO L225 Difference]: With dead ends: 171236 [2021-12-06 17:28:02,298 INFO L226 Difference]: Without dead ends: 130680 [2021-12-06 17:28:02,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:28:02,361 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 11998 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 39075 mSolverCounterSat, 3549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11998 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 42624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3549 IncrementalHoareTripleChecker+Valid, 39075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:02,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11998 Valid, 304 Invalid, 42624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3549 Valid, 39075 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2021-12-06 17:28:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130680 states. [2021-12-06 17:28:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130680 to 84116. [2021-12-06 17:28:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84116 states, 84115 states have (on average 1.1242227902276645) internal successors, (94564), 84115 states have internal predecessors, (94564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84116 states to 84116 states and 94564 transitions. [2021-12-06 17:28:03,281 INFO L78 Accepts]: Start accepts. Automaton has 84116 states and 94564 transitions. Word has length 421 [2021-12-06 17:28:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:03,281 INFO L470 AbstractCegarLoop]: Abstraction has 84116 states and 94564 transitions. [2021-12-06 17:28:03,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 80.36363636363636) internal successors, (884), 11 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 84116 states and 94564 transitions. [2021-12-06 17:28:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-12-06 17:28:03,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:03,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:03,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:28:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 17:28:03,491 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -15096808, now seen corresponding path program 1 times [2021-12-06 17:28:03,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:03,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175232047] [2021-12-06 17:28:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:03,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 410 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-06 17:28:03,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175232047] [2021-12-06 17:28:03,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175232047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:03,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:03,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:03,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978023240] [2021-12-06 17:28:03,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:03,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:03,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:03,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:03,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:03,622 INFO L87 Difference]: Start difference. First operand 84116 states and 94564 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:06,416 INFO L93 Difference]: Finished difference Result 225306 states and 254534 transitions. [2021-12-06 17:28:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 463 [2021-12-06 17:28:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:06,561 INFO L225 Difference]: With dead ends: 225306 [2021-12-06 17:28:06,561 INFO L226 Difference]: Without dead ends: 140441 [2021-12-06 17:28:06,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:06,601 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 657 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:06,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 1343 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:28:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140441 states. [2021-12-06 17:28:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140441 to 130678. [2021-12-06 17:28:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130678 states, 130677 states have (on average 1.1015480918600824) internal successors, (143947), 130677 states have internal predecessors, (143947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130678 states to 130678 states and 143947 transitions. [2021-12-06 17:28:08,016 INFO L78 Accepts]: Start accepts. Automaton has 130678 states and 143947 transitions. Word has length 463 [2021-12-06 17:28:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:08,016 INFO L470 AbstractCegarLoop]: Abstraction has 130678 states and 143947 transitions. [2021-12-06 17:28:08,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 130678 states and 143947 transitions. [2021-12-06 17:28:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-06 17:28:08,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:08,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:08,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:28:08,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -321984110, now seen corresponding path program 1 times [2021-12-06 17:28:08,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:08,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934298337] [2021-12-06 17:28:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:08,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-06 17:28:08,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:08,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934298337] [2021-12-06 17:28:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934298337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:08,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816379295] [2021-12-06 17:28:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:08,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:08,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:08,165 INFO L87 Difference]: Start difference. First operand 130678 states and 143947 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:11,066 INFO L93 Difference]: Finished difference Result 310169 states and 344532 transitions. [2021-12-06 17:28:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 488 [2021-12-06 17:28:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:11,247 INFO L225 Difference]: With dead ends: 310169 [2021-12-06 17:28:11,247 INFO L226 Difference]: Without dead ends: 178742 [2021-12-06 17:28:11,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:11,345 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 781 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:11,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1124 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:28:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178742 states. [2021-12-06 17:28:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178742 to 171232. [2021-12-06 17:28:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171232 states, 171231 states have (on average 1.1036844963820804) internal successors, (188985), 171231 states have internal predecessors, (188985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171232 states to 171232 states and 188985 transitions. [2021-12-06 17:28:13,040 INFO L78 Accepts]: Start accepts. Automaton has 171232 states and 188985 transitions. Word has length 488 [2021-12-06 17:28:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:13,040 INFO L470 AbstractCegarLoop]: Abstraction has 171232 states and 188985 transitions. [2021-12-06 17:28:13,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 171232 states and 188985 transitions. [2021-12-06 17:28:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-06 17:28:13,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:13,054 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:13,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:28:13,054 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash 8677539, now seen corresponding path program 1 times [2021-12-06 17:28:13,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:13,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656864298] [2021-12-06 17:28:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:13,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 463 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-06 17:28:13,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656864298] [2021-12-06 17:28:13,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656864298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:13,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:13,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:13,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109347086] [2021-12-06 17:28:13,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:13,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:13,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:13,274 INFO L87 Difference]: Start difference. First operand 171232 states and 188985 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:16,557 INFO L93 Difference]: Finished difference Result 343964 states and 379477 transitions. [2021-12-06 17:28:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 494 [2021-12-06 17:28:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:16,744 INFO L225 Difference]: With dead ends: 343964 [2021-12-06 17:28:16,744 INFO L226 Difference]: Without dead ends: 172734 [2021-12-06 17:28:16,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:16,805 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 800 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:16,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 222 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 17:28:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172734 states. [2021-12-06 17:28:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172734 to 160718. [2021-12-06 17:28:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160718 states, 160717 states have (on average 1.07856045097905) internal successors, (173343), 160717 states have internal predecessors, (173343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160718 states to 160718 states and 173343 transitions. [2021-12-06 17:28:18,436 INFO L78 Accepts]: Start accepts. Automaton has 160718 states and 173343 transitions. Word has length 494 [2021-12-06 17:28:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:18,437 INFO L470 AbstractCegarLoop]: Abstraction has 160718 states and 173343 transitions. [2021-12-06 17:28:18,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 160718 states and 173343 transitions. [2021-12-06 17:28:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-12-06 17:28:18,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:18,446 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:18,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:28:18,446 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1716293343, now seen corresponding path program 1 times [2021-12-06 17:28:18,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:18,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760535879] [2021-12-06 17:28:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:18,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 597 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 17:28:18,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760535879] [2021-12-06 17:28:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760535879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:18,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:18,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:18,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99443520] [2021-12-06 17:28:18,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:18,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:18,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:18,555 INFO L87 Difference]: Start difference. First operand 160718 states and 173343 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:21,800 INFO L93 Difference]: Finished difference Result 362739 states and 392799 transitions. [2021-12-06 17:28:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 494 [2021-12-06 17:28:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:22,041 INFO L225 Difference]: With dead ends: 362739 [2021-12-06 17:28:22,041 INFO L226 Difference]: Without dead ends: 202023 [2021-12-06 17:28:22,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:22,267 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 666 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:22,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 1243 Invalid, 2818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:28:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202023 states. [2021-12-06 17:28:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202023 to 196015. [2021-12-06 17:28:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196015 states, 196014 states have (on average 1.070474557939739) internal successors, (209828), 196014 states have internal predecessors, (209828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196015 states to 196015 states and 209828 transitions. [2021-12-06 17:28:24,247 INFO L78 Accepts]: Start accepts. Automaton has 196015 states and 209828 transitions. Word has length 494 [2021-12-06 17:28:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:24,248 INFO L470 AbstractCegarLoop]: Abstraction has 196015 states and 209828 transitions. [2021-12-06 17:28:24,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 196015 states and 209828 transitions. [2021-12-06 17:28:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-12-06 17:28:24,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:24,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:24,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:28:24,257 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1685247736, now seen corresponding path program 1 times [2021-12-06 17:28:24,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:24,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123990931] [2021-12-06 17:28:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:24,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-12-06 17:28:24,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:24,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123990931] [2021-12-06 17:28:24,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123990931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:24,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:28:24,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:28:24,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364101929] [2021-12-06 17:28:24,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:24,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:24,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:24,378 INFO L87 Difference]: Start difference. First operand 196015 states and 209828 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:27,480 INFO L93 Difference]: Finished difference Result 395783 states and 423457 transitions. [2021-12-06 17:28:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 545 [2021-12-06 17:28:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:27,688 INFO L225 Difference]: With dead ends: 395783 [2021-12-06 17:28:27,688 INFO L226 Difference]: Without dead ends: 195264 [2021-12-06 17:28:27,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:28:27,757 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 665 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:27,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1314 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:28:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195264 states. [2021-12-06 17:28:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195264 to 185501. [2021-12-06 17:28:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185501 states, 185500 states have (on average 1.0638706199460917) internal successors, (197348), 185500 states have internal predecessors, (197348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185501 states to 185501 states and 197348 transitions. [2021-12-06 17:28:29,769 INFO L78 Accepts]: Start accepts. Automaton has 185501 states and 197348 transitions. Word has length 545 [2021-12-06 17:28:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:29,769 INFO L470 AbstractCegarLoop]: Abstraction has 185501 states and 197348 transitions. [2021-12-06 17:28:29,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 185501 states and 197348 transitions. [2021-12-06 17:28:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-12-06 17:28:29,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:29,779 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:29,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:28:29,779 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1434748982, now seen corresponding path program 1 times [2021-12-06 17:28:29,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653546873] [2021-12-06 17:28:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:29,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 626 proven. 54 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-06 17:28:29,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653546873] [2021-12-06 17:28:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653546873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754631726] [2021-12-06 17:28:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:29,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:28:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:28:29,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:28:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:28:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:28:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 600 proven. 129 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-06 17:28:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:28:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 600 proven. 129 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-06 17:28:31,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754631726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:28:31,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:28:31,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-06 17:28:31,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17970858] [2021-12-06 17:28:31,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:28:31,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:28:31,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:28:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:28:31,042 INFO L87 Difference]: Start difference. First operand 185501 states and 197348 transitions. Second operand has 11 states, 11 states have (on average 104.63636363636364) internal successors, (1151), 11 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:52,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:52,074 INFO L93 Difference]: Finished difference Result 496417 states and 526261 transitions. [2021-12-06 17:28:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:28:52,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 104.63636363636364) internal successors, (1151), 11 states have internal predecessors, (1151), 0 states have call successors, (0), 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 568 [2021-12-06 17:28:52,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:52,385 INFO L225 Difference]: With dead ends: 496417 [2021-12-06 17:28:52,385 INFO L226 Difference]: Without dead ends: 307163 [2021-12-06 17:28:52,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1154 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=875, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:28:52,447 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 31563 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 28086 mSolverCounterSat, 6786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31563 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 34872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6786 IncrementalHoareTripleChecker+Valid, 28086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:52,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31563 Valid, 201 Invalid, 34872 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6786 Valid, 28086 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2021-12-06 17:28:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307163 states. [2021-12-06 17:28:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307163 to 204276. [2021-12-06 17:28:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204276 states, 204275 states have (on average 1.05189083343532) internal successors, (214875), 204275 states have internal predecessors, (214875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204276 states to 204276 states and 214875 transitions. [2021-12-06 17:28:54,975 INFO L78 Accepts]: Start accepts. Automaton has 204276 states and 214875 transitions. Word has length 568 [2021-12-06 17:28:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:28:54,976 INFO L470 AbstractCegarLoop]: Abstraction has 204276 states and 214875 transitions. [2021-12-06 17:28:54,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.63636363636364) internal successors, (1151), 11 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 204276 states and 214875 transitions. [2021-12-06 17:28:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-12-06 17:28:54,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:28:54,991 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:28:55,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:28:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:28:55,193 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:28:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:28:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash 795715432, now seen corresponding path program 1 times [2021-12-06 17:28:55,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:28:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398251422] [2021-12-06 17:28:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:55,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:28:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 712 proven. 372 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 17:28:55,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:28:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398251422] [2021-12-06 17:28:55,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398251422] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:28:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745474149] [2021-12-06 17:28:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:28:55,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:28:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:28:55,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:28:55,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:28:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:28:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:28:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:28:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-06 17:28:55,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:28:55,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745474149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:28:55,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:28:55,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-06 17:28:55,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657099892] [2021-12-06 17:28:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:28:55,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:28:55,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:28:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:28:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:28:55,930 INFO L87 Difference]: Start difference. First operand 204276 states and 214875 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:28:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:28:59,264 INFO L93 Difference]: Finished difference Result 426574 states and 448661 transitions. [2021-12-06 17:28:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:28:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 629 [2021-12-06 17:28:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:28:59,504 INFO L225 Difference]: With dead ends: 426574 [2021-12-06 17:28:59,504 INFO L226 Difference]: Without dead ends: 218545 [2021-12-06 17:28:59,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:28:59,788 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 862 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:28:59,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 352 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:28:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218545 states. [2021-12-06 17:29:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218545 to 209533. [2021-12-06 17:29:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209533 states, 209532 states have (on average 1.0364192581562721) internal successors, (217163), 209532 states have internal predecessors, (217163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209533 states to 209533 states and 217163 transitions. [2021-12-06 17:29:01,933 INFO L78 Accepts]: Start accepts. Automaton has 209533 states and 217163 transitions. Word has length 629 [2021-12-06 17:29:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:01,934 INFO L470 AbstractCegarLoop]: Abstraction has 209533 states and 217163 transitions. [2021-12-06 17:29:01,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 209533 states and 217163 transitions. [2021-12-06 17:29:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-12-06 17:29:01,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:01,949 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:01,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:29:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:29:02,152 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 248997848, now seen corresponding path program 1 times [2021-12-06 17:29:02,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:02,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615403991] [2021-12-06 17:29:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:02,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 831 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-12-06 17:29:02,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:02,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615403991] [2021-12-06 17:29:02,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615403991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:02,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:02,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:02,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415063576] [2021-12-06 17:29:02,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:02,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:02,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:02,514 INFO L87 Difference]: Start difference. First operand 209533 states and 217163 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:05,525 INFO L93 Difference]: Finished difference Result 422068 states and 437377 transitions. [2021-12-06 17:29:05,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 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 700 [2021-12-06 17:29:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:05,783 INFO L225 Difference]: With dead ends: 422068 [2021-12-06 17:29:05,783 INFO L226 Difference]: Without dead ends: 213288 [2021-12-06 17:29:05,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:05,872 INFO L933 BasicCegarLoop]: 1090 mSDtfsCounter, 669 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:05,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1097 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:29:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213288 states. [2021-12-06 17:29:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213288 to 209533. [2021-12-06 17:29:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209533 states, 209532 states have (on average 1.0324962296928393) internal successors, (216341), 209532 states have internal predecessors, (216341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209533 states to 209533 states and 216341 transitions. [2021-12-06 17:29:08,108 INFO L78 Accepts]: Start accepts. Automaton has 209533 states and 216341 transitions. Word has length 700 [2021-12-06 17:29:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:08,109 INFO L470 AbstractCegarLoop]: Abstraction has 209533 states and 216341 transitions. [2021-12-06 17:29:08,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 209533 states and 216341 transitions. [2021-12-06 17:29:08,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2021-12-06 17:29:08,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:08,139 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:08,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:29:08,140 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:08,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 279251277, now seen corresponding path program 1 times [2021-12-06 17:29:08,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809423555] [2021-12-06 17:29:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:08,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-12-06 17:29:08,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809423555] [2021-12-06 17:29:08,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809423555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:08,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:08,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:08,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191932985] [2021-12-06 17:29:08,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:08,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:08,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:08,508 INFO L87 Difference]: Start difference. First operand 209533 states and 216341 transitions. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:11,142 INFO L93 Difference]: Finished difference Result 418313 states and 431924 transitions. [2021-12-06 17:29:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 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 825 [2021-12-06 17:29:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:11,363 INFO L225 Difference]: With dead ends: 418313 [2021-12-06 17:29:11,364 INFO L226 Difference]: Without dead ends: 209533 [2021-12-06 17:29:11,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:11,430 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 812 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:11,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 1014 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:29:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209533 states. [2021-12-06 17:29:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209533 to 208031. [2021-12-06 17:29:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208031 states, 208030 states have (on average 1.0303610056241888) internal successors, (214346), 208030 states have internal predecessors, (214346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208031 states to 208031 states and 214346 transitions. [2021-12-06 17:29:13,811 INFO L78 Accepts]: Start accepts. Automaton has 208031 states and 214346 transitions. Word has length 825 [2021-12-06 17:29:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:13,812 INFO L470 AbstractCegarLoop]: Abstraction has 208031 states and 214346 transitions. [2021-12-06 17:29:13,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 208031 states and 214346 transitions. [2021-12-06 17:29:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2021-12-06 17:29:13,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:13,843 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:13,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:29:13,844 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1593311062, now seen corresponding path program 1 times [2021-12-06 17:29:13,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017487444] [2021-12-06 17:29:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:13,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 1610 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-12-06 17:29:14,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017487444] [2021-12-06 17:29:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017487444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:14,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767674744] [2021-12-06 17:29:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:14,058 INFO L87 Difference]: Start difference. First operand 208031 states and 214346 transitions. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:17,634 INFO L93 Difference]: Finished difference Result 441594 states and 455195 transitions. [2021-12-06 17:29:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:17,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 912 [2021-12-06 17:29:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:17,913 INFO L225 Difference]: With dead ends: 441594 [2021-12-06 17:29:17,913 INFO L226 Difference]: Without dead ends: 234316 [2021-12-06 17:29:18,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:18,001 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 671 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1107 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 17:29:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234316 states. [2021-12-06 17:29:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234316 to 229810. [2021-12-06 17:29:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229810 states, 229809 states have (on average 1.0297464416102067) internal successors, (236645), 229809 states have internal predecessors, (236645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229810 states to 229810 states and 236645 transitions. [2021-12-06 17:29:20,654 INFO L78 Accepts]: Start accepts. Automaton has 229810 states and 236645 transitions. Word has length 912 [2021-12-06 17:29:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:20,654 INFO L470 AbstractCegarLoop]: Abstraction has 229810 states and 236645 transitions. [2021-12-06 17:29:20,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 229810 states and 236645 transitions. [2021-12-06 17:29:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2021-12-06 17:29:20,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:20,689 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:20,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:29:20,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash -676551802, now seen corresponding path program 1 times [2021-12-06 17:29:20,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:20,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54043169] [2021-12-06 17:29:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:20,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 1209 proven. 54 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2021-12-06 17:29:21,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54043169] [2021-12-06 17:29:21,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54043169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:21,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286853647] [2021-12-06 17:29:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:21,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:21,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:21,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:29:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:29:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 1263 proven. 0 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2021-12-06 17:29:22,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286853647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:22,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:29:22,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 17:29:22,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520335151] [2021-12-06 17:29:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:22,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:29:22,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:29:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:29:22,087 INFO L87 Difference]: Start difference. First operand 229810 states and 236645 transitions. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:25,616 INFO L93 Difference]: Finished difference Result 458867 states and 472529 transitions. [2021-12-06 17:29:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:29:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 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 917 [2021-12-06 17:29:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:25,867 INFO L225 Difference]: With dead ends: 458867 [2021-12-06 17:29:25,868 INFO L226 Difference]: Without dead ends: 229810 [2021-12-06 17:29:25,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:29:25,947 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 1278 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:25,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 345 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:29:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229810 states. [2021-12-06 17:29:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229810 to 217794. [2021-12-06 17:29:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217794 states, 217793 states have (on average 1.0242477949245385) internal successors, (223074), 217793 states have internal predecessors, (223074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217794 states to 217794 states and 223074 transitions. [2021-12-06 17:29:28,593 INFO L78 Accepts]: Start accepts. Automaton has 217794 states and 223074 transitions. Word has length 917 [2021-12-06 17:29:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:28,594 INFO L470 AbstractCegarLoop]: Abstraction has 217794 states and 223074 transitions. [2021-12-06 17:29:28,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 217794 states and 223074 transitions. [2021-12-06 17:29:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2021-12-06 17:29:28,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:28,625 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:28,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 17:29:28,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:28,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2032391548, now seen corresponding path program 1 times [2021-12-06 17:29:28,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931884838] [2021-12-06 17:29:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:28,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-12-06 17:29:29,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931884838] [2021-12-06 17:29:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931884838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:29,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:29,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222520285] [2021-12-06 17:29:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:29,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:29,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:29,121 INFO L87 Difference]: Start difference. First operand 217794 states and 223074 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:32,204 INFO L93 Difference]: Finished difference Result 455112 states and 466423 transitions. [2021-12-06 17:29:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:32,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 993 [2021-12-06 17:29:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:32,467 INFO L225 Difference]: With dead ends: 455112 [2021-12-06 17:29:32,467 INFO L226 Difference]: Without dead ends: 238071 [2021-12-06 17:29:32,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:32,547 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 713 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:32,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1066 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2096 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:29:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238071 states. [2021-12-06 17:29:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238071 to 211786. [2021-12-06 17:29:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211786 states, 211785 states have (on average 1.022928913756876) internal successors, (216641), 211785 states have internal predecessors, (216641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211786 states to 211786 states and 216641 transitions. [2021-12-06 17:29:35,021 INFO L78 Accepts]: Start accepts. Automaton has 211786 states and 216641 transitions. Word has length 993 [2021-12-06 17:29:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:35,021 INFO L470 AbstractCegarLoop]: Abstraction has 211786 states and 216641 transitions. [2021-12-06 17:29:35,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 211786 states and 216641 transitions. [2021-12-06 17:29:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2021-12-06 17:29:35,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:35,189 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:35,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:29:35,190 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -498920605, now seen corresponding path program 1 times [2021-12-06 17:29:35,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:35,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383075754] [2021-12-06 17:29:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:35,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 1737 proven. 0 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-12-06 17:29:35,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383075754] [2021-12-06 17:29:35,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383075754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:35,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:35,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:35,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322572319] [2021-12-06 17:29:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:35,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:35,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:35,449 INFO L87 Difference]: Start difference. First operand 211786 states and 216641 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:37,970 INFO L93 Difference]: Finished difference Result 421317 states and 430985 transitions. [2021-12-06 17:29:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:37,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 1007 [2021-12-06 17:29:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:38,192 INFO L225 Difference]: With dead ends: 421317 [2021-12-06 17:29:38,192 INFO L226 Difference]: Without dead ends: 210284 [2021-12-06 17:29:38,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:38,241 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 763 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:38,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 118 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:29:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210284 states. [2021-12-06 17:29:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210284 to 210284. [2021-12-06 17:29:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210284 states, 210283 states have (on average 1.0192312264900159) internal successors, (214327), 210283 states have internal predecessors, (214327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210284 states to 210284 states and 214327 transitions. [2021-12-06 17:29:40,515 INFO L78 Accepts]: Start accepts. Automaton has 210284 states and 214327 transitions. Word has length 1007 [2021-12-06 17:29:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:40,515 INFO L470 AbstractCegarLoop]: Abstraction has 210284 states and 214327 transitions. [2021-12-06 17:29:40,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:40,515 INFO L276 IsEmpty]: Start isEmpty. Operand 210284 states and 214327 transitions. [2021-12-06 17:29:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2021-12-06 17:29:40,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:40,555 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:40,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:29:40,555 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1293335392, now seen corresponding path program 1 times [2021-12-06 17:29:40,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:40,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594632778] [2021-12-06 17:29:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:40,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 1790 proven. 108 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-12-06 17:29:40,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594632778] [2021-12-06 17:29:40,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594632778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:29:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144398830] [2021-12-06 17:29:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:40,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:29:40,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:29:40,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:29:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:29:41,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:29:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 1844 proven. 0 refuted. 0 times theorem prover too weak. 1023 trivial. 0 not checked. [2021-12-06 17:29:41,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:29:41,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144398830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:41,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:29:41,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 17:29:41,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289506052] [2021-12-06 17:29:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:41,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:41,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:29:41,962 INFO L87 Difference]: Start difference. First operand 210284 states and 214327 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:44,651 INFO L93 Difference]: Finished difference Result 419815 states and 427896 transitions. [2021-12-06 17:29:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:44,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 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 1030 [2021-12-06 17:29:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:44,890 INFO L225 Difference]: With dead ends: 419815 [2021-12-06 17:29:44,890 INFO L226 Difference]: Without dead ends: 210284 [2021-12-06 17:29:44,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 1029 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:29:44,971 INFO L933 BasicCegarLoop]: 1205 mSDtfsCounter, 614 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:44,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1213 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:29:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210284 states. [2021-12-06 17:29:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210284 to 207280. [2021-12-06 17:29:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207280 states, 207279 states have (on average 1.0187380294192852) internal successors, (211163), 207279 states have internal predecessors, (211163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207280 states to 207280 states and 211163 transitions. [2021-12-06 17:29:47,132 INFO L78 Accepts]: Start accepts. Automaton has 207280 states and 211163 transitions. Word has length 1030 [2021-12-06 17:29:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:47,133 INFO L470 AbstractCegarLoop]: Abstraction has 207280 states and 211163 transitions. [2021-12-06 17:29:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 207280 states and 211163 transitions. [2021-12-06 17:29:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1050 [2021-12-06 17:29:47,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:47,179 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:47,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:29:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:29:47,382 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1452584808, now seen corresponding path program 1 times [2021-12-06 17:29:47,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397735478] [2021-12-06 17:29:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:47,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2967 backedges. 1921 proven. 0 refuted. 0 times theorem prover too weak. 1046 trivial. 0 not checked. [2021-12-06 17:29:47,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:47,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397735478] [2021-12-06 17:29:47,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397735478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:47,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:47,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:47,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431703325] [2021-12-06 17:29:47,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:47,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:47,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:47,675 INFO L87 Difference]: Start difference. First operand 207280 states and 211163 transitions. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:50,721 INFO L93 Difference]: Finished difference Result 418313 states and 426154 transitions. [2021-12-06 17:29:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 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 1049 [2021-12-06 17:29:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:50,965 INFO L225 Difference]: With dead ends: 418313 [2021-12-06 17:29:50,965 INFO L226 Difference]: Without dead ends: 211035 [2021-12-06 17:29:51,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:51,032 INFO L933 BasicCegarLoop]: 1195 mSDtfsCounter, 611 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:51,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1203 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:29:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211035 states. [2021-12-06 17:29:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211035 to 208782. [2021-12-06 17:29:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208782 states, 208781 states have (on average 1.0180955163544576) internal successors, (212559), 208781 states have internal predecessors, (212559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208782 states to 208782 states and 212559 transitions. [2021-12-06 17:29:53,275 INFO L78 Accepts]: Start accepts. Automaton has 208782 states and 212559 transitions. Word has length 1049 [2021-12-06 17:29:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:53,276 INFO L470 AbstractCegarLoop]: Abstraction has 208782 states and 212559 transitions. [2021-12-06 17:29:53,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 208782 states and 212559 transitions. [2021-12-06 17:29:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2021-12-06 17:29:53,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:53,327 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:53,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:29:53,327 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1593301975, now seen corresponding path program 1 times [2021-12-06 17:29:53,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353763843] [2021-12-06 17:29:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:53,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:29:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3279 backedges. 2237 proven. 0 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-06 17:29:53,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:29:53,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353763843] [2021-12-06 17:29:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353763843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:29:53,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:29:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:29:53,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564146411] [2021-12-06 17:29:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:29:53,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:29:53,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:29:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:29:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:53,770 INFO L87 Difference]: Start difference. First operand 208782 states and 212559 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:29:56,842 INFO L93 Difference]: Finished difference Result 428076 states and 435727 transitions. [2021-12-06 17:29:56,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:29:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 1102 [2021-12-06 17:29:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:29:57,079 INFO L225 Difference]: With dead ends: 428076 [2021-12-06 17:29:57,079 INFO L226 Difference]: Without dead ends: 220047 [2021-12-06 17:29:57,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:29:57,145 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 602 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:29:57,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 402 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:29:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220047 states. [2021-12-06 17:29:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220047 to 211786. [2021-12-06 17:29:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211786 states, 211785 states have (on average 1.01724390301485) internal successors, (215437), 211785 states have internal predecessors, (215437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211786 states to 211786 states and 215437 transitions. [2021-12-06 17:29:59,600 INFO L78 Accepts]: Start accepts. Automaton has 211786 states and 215437 transitions. Word has length 1102 [2021-12-06 17:29:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:29:59,601 INFO L470 AbstractCegarLoop]: Abstraction has 211786 states and 215437 transitions. [2021-12-06 17:29:59,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:29:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 211786 states and 215437 transitions. [2021-12-06 17:29:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2021-12-06 17:29:59,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:29:59,651 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:29:59,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:29:59,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:29:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:29:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1504470663, now seen corresponding path program 1 times [2021-12-06 17:29:59,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:29:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503893918] [2021-12-06 17:29:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:29:59,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:29:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 1392 proven. 240 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2021-12-06 17:30:00,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:30:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503893918] [2021-12-06 17:30:00,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503893918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:30:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980758080] [2021-12-06 17:30:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:30:00,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:30:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:30:00,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:30:00,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2896c55e-316b-476a-998d-af9b134cb8d2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:30:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:30:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:30:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates...