./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.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_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/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_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/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_85867e09-2372-4ccb-b0ab-e4184ad56afc/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 d852cbbb6aa933b5bfc297e03d0d3456bac2eafa50ad19971e71951b44cb15d3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:46:07,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:46:07,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:46:07,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:46:07,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:46:07,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:46:07,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:46:07,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:46:07,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:46:07,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:46:07,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:46:07,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:46:07,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:46:07,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:46:07,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:46:07,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:46:07,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:46:07,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:46:07,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:46:07,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:46:07,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:46:07,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:46:07,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:46:07,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:46:07,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:46:07,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:46:07,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:46:07,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:46:07,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:46:07,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:46:07,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:46:07,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:46:07,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:46:07,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:46:07,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:46:07,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:46:07,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:46:07,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:46:07,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:46:07,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:46:07,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:46:07,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:46:07,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:46:07,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:46:07,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:46:07,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:46:07,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:46:07,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:46:07,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:46:07,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:46:07,486 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:46:07,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:46:07,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:46:07,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:46:07,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:46:07,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:46:07,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:46:07,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:46:07,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:46:07,489 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_85867e09-2372-4ccb-b0ab-e4184ad56afc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d852cbbb6aa933b5bfc297e03d0d3456bac2eafa50ad19971e71951b44cb15d3 [2021-12-06 23:46:07,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:46:07,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:46:07,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:46:07,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:46:07,687 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:46:07,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:46:07,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/data/642cfba1f/eb633492d54041f6af91f461705a565f/FLAG18c707efe [2021-12-06 23:46:08,100 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:46:08,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:46:08,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/data/642cfba1f/eb633492d54041f6af91f461705a565f/FLAG18c707efe [2021-12-06 23:46:08,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/data/642cfba1f/eb633492d54041f6af91f461705a565f [2021-12-06 23:46:08,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:46:08,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:46:08,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:46:08,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:46:08,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:46:08,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668c38e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08, skipping insertion in model container [2021-12-06 23:46:08,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:46:08,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:46:08,296 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_85867e09-2372-4ccb-b0ab-e4184ad56afc/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2021-12-06 23:46:08,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:46:08,304 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:46:08,330 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_85867e09-2372-4ccb-b0ab-e4184ad56afc/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2021-12-06 23:46:08,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:46:08,341 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:46:08,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08 WrapperNode [2021-12-06 23:46:08,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:46:08,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:46:08,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:46:08,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:46:08,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,373 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 220 [2021-12-06 23:46:08,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:46:08,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:46:08,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:46:08,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:46:08,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:46:08,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:46:08,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:46:08,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:46:08,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (1/1) ... [2021-12-06 23:46:08,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:46:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:08,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:46:08,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:46:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:46:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:46:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:46:08,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:46:08,514 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:46:08,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:46:08,692 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:46:08,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:46:08,700 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:46:08,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:46:08 BoogieIcfgContainer [2021-12-06 23:46:08,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:46:08,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:46:08,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:46:08,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:46:08,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:46:08" (1/3) ... [2021-12-06 23:46:08,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de942db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:46:08, skipping insertion in model container [2021-12-06 23:46:08,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:46:08" (2/3) ... [2021-12-06 23:46:08,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de942db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:46:08, skipping insertion in model container [2021-12-06 23:46:08,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:46:08" (3/3) ... [2021-12-06 23:46:08,710 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2021-12-06 23:46:08,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:46:08,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:46:08,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:46:08,770 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 23:46:08,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:46:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 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 23:46:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:46:08,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:08,788 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] [2021-12-06 23:46:08,788 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2021-12-06 23:46:08,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187113805] [2021-12-06 23:46:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:08,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:08,952 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 23:46:08,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:08,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187113805] [2021-12-06 23:46:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187113805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:08,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:08,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:46:08,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791414111] [2021-12-06 23:46:08,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:08,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:46:08,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:46:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:46:08,980 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 61 states have internal predecessors, (101), 0 states have call successors, (0), 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 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:46:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:08,995 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2021-12-06 23:46:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:46:08,997 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-06 23:46:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,003 INFO L225 Difference]: With dead ends: 103 [2021-12-06 23:46:09,004 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 23:46:09,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:46:09,009 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 23:46:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 23:46:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 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 23:46:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2021-12-06 23:46:09,037 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2021-12-06 23:46:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,038 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2021-12-06 23:46:09,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:46:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2021-12-06 23:46:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:46:09,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,039 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] [2021-12-06 23:46:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:46:09,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2021-12-06 23:46:09,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710326682] [2021-12-06 23:46:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,100 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 23:46:09,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710326682] [2021-12-06 23:46:09,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710326682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:09,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279391038] [2021-12-06 23:46:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:09,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:09,103 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:46:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,156 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2021-12-06 23:46:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:46:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-06 23:46:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,158 INFO L225 Difference]: With dead ends: 134 [2021-12-06 23:46:09,158 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:46:09,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:46:09,159 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 58 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 339 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:46:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2021-12-06 23:46:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 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 23:46:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2021-12-06 23:46:09,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2021-12-06 23:46:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,166 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2021-12-06 23:46:09,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:46:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2021-12-06 23:46:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:46:09,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,168 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] [2021-12-06 23:46:09,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:46:09,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2021-12-06 23:46:09,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440860951] [2021-12-06 23:46:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,225 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 23:46:09,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440860951] [2021-12-06 23:46:09,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440860951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:09,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350733314] [2021-12-06 23:46:09,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:09,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:09,227 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,244 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-12-06 23:46:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-06 23:46:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,245 INFO L225 Difference]: With dead ends: 124 [2021-12-06 23:46:09,245 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 23:46:09,246 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 23:46:09,247 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 23:46:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-12-06 23:46:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:46:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2021-12-06 23:46:09,255 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2021-12-06 23:46:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2021-12-06 23:46:09,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2021-12-06 23:46:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:46:09,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,257 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] [2021-12-06 23:46:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:46:09,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2021-12-06 23:46:09,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508442136] [2021-12-06 23:46:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,304 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 23:46:09,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508442136] [2021-12-06 23:46:09,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508442136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:09,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548947215] [2021-12-06 23:46:09,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:09,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:09,306 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,322 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2021-12-06 23:46:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-06 23:46:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,324 INFO L225 Difference]: With dead ends: 202 [2021-12-06 23:46:09,324 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 23:46:09,324 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 23:46:09,326 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 173 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 23:46:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-12-06 23:46:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.474074074074074) internal successors, (199), 135 states have internal predecessors, (199), 0 states have call successors, (0), 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 23:46:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-12-06 23:46:09,338 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2021-12-06 23:46:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-12-06 23:46:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-12-06 23:46:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:46:09,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,340 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] [2021-12-06 23:46:09,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:46:09,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2021-12-06 23:46:09,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629429669] [2021-12-06 23:46:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,383 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 23:46:09,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629429669] [2021-12-06 23:46:09,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629429669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:09,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724507392] [2021-12-06 23:46:09,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:09,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:09,385 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,405 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2021-12-06 23:46:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-06 23:46:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,407 INFO L225 Difference]: With dead ends: 340 [2021-12-06 23:46:09,407 INFO L226 Difference]: Without dead ends: 226 [2021-12-06 23:46:09,408 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 23:46:09,409 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 172 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-06 23:46:09,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-12-06 23:46:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.484304932735426) internal successors, (331), 223 states have internal predecessors, (331), 0 states have call successors, (0), 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 23:46:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2021-12-06 23:46:09,427 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2021-12-06 23:46:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,427 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2021-12-06 23:46:09,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2021-12-06 23:46:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:46:09,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,428 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] [2021-12-06 23:46:09,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:46:09,429 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2021-12-06 23:46:09,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772606552] [2021-12-06 23:46:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,478 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 23:46:09,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772606552] [2021-12-06 23:46:09,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772606552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:09,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727110647] [2021-12-06 23:46:09,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:09,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:09,480 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,576 INFO L93 Difference]: Finished difference Result 1436 states and 2185 transitions. [2021-12-06 23:46:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:46:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-06 23:46:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,583 INFO L225 Difference]: With dead ends: 1436 [2021-12-06 23:46:09,583 INFO L226 Difference]: Without dead ends: 1234 [2021-12-06 23:46:09,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:46:09,586 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 385 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 371 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-12-06 23:46:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 424. [2021-12-06 23:46:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4728132387706856) internal successors, (623), 423 states have internal predecessors, (623), 0 states have call successors, (0), 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 23:46:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 623 transitions. [2021-12-06 23:46:09,621 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 623 transitions. Word has length 40 [2021-12-06 23:46:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,621 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 623 transitions. [2021-12-06 23:46:09,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:46:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 623 transitions. [2021-12-06 23:46:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 23:46:09,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,622 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] [2021-12-06 23:46:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:46:09,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1209274118, now seen corresponding path program 1 times [2021-12-06 23:46:09,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938119887] [2021-12-06 23:46:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,711 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 23:46:09,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938119887] [2021-12-06 23:46:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938119887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896219358] [2021-12-06 23:46:09,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:09,713 INFO L87 Difference]: Start difference. First operand 424 states and 623 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 23:46:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,769 INFO L93 Difference]: Finished difference Result 828 states and 1225 transitions. [2021-12-06 23:46:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:46:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-06 23:46:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,772 INFO L225 Difference]: With dead ends: 828 [2021-12-06 23:46:09,772 INFO L226 Difference]: Without dead ends: 426 [2021-12-06 23:46:09,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:46:09,774 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 89 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 229 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-06 23:46:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2021-12-06 23:46:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4539007092198581) internal successors, (615), 423 states have internal predecessors, (615), 0 states have call successors, (0), 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 23:46:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 615 transitions. [2021-12-06 23:46:09,793 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 615 transitions. Word has length 42 [2021-12-06 23:46:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,794 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 615 transitions. [2021-12-06 23:46:09,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 23:46:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 615 transitions. [2021-12-06 23:46:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 23:46:09,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,795 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] [2021-12-06 23:46:09,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:46:09,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1142780606, now seen corresponding path program 1 times [2021-12-06 23:46:09,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925518419] [2021-12-06 23:46:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,825 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 23:46:09,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925518419] [2021-12-06 23:46:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925518419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:09,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247245571] [2021-12-06 23:46:09,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:09,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:09,827 INFO L87 Difference]: Start difference. First operand 424 states and 615 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 23:46:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:09,855 INFO L93 Difference]: Finished difference Result 1010 states and 1475 transitions. [2021-12-06 23:46:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:09,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-06 23:46:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:09,858 INFO L225 Difference]: With dead ends: 1010 [2021-12-06 23:46:09,858 INFO L226 Difference]: Without dead ends: 608 [2021-12-06 23:46:09,859 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 23:46:09,860 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:09,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-06 23:46:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2021-12-06 23:46:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.4363636363636363) internal successors, (869), 605 states have internal predecessors, (869), 0 states have call successors, (0), 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 23:46:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 869 transitions. [2021-12-06 23:46:09,884 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 869 transitions. Word has length 42 [2021-12-06 23:46:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:09,885 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 869 transitions. [2021-12-06 23:46:09,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 23:46:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 869 transitions. [2021-12-06 23:46:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:46:09,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:09,886 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] [2021-12-06 23:46:09,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:46:09,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1581931209, now seen corresponding path program 1 times [2021-12-06 23:46:09,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:09,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279154931] [2021-12-06 23:46:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:09,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:09,943 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 23:46:09,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:09,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279154931] [2021-12-06 23:46:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279154931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:09,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:09,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:09,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603594180] [2021-12-06 23:46:09,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:09,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:46:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:46:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:46:09,945 INFO L87 Difference]: Start difference. First operand 606 states and 869 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:46:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:10,098 INFO L93 Difference]: Finished difference Result 1686 states and 2443 transitions. [2021-12-06 23:46:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:46:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-06 23:46:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:10,103 INFO L225 Difference]: With dead ends: 1686 [2021-12-06 23:46:10,103 INFO L226 Difference]: Without dead ends: 1104 [2021-12-06 23:46:10,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:46:10,105 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 366 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:10,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 141 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:46:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-12-06 23:46:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1006. [2021-12-06 23:46:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.4378109452736318) internal successors, (1445), 1005 states have internal predecessors, (1445), 0 states have call successors, (0), 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 23:46:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1445 transitions. [2021-12-06 23:46:10,148 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1445 transitions. Word has length 43 [2021-12-06 23:46:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:10,148 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1445 transitions. [2021-12-06 23:46:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:46:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1445 transitions. [2021-12-06 23:46:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:46:10,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:10,149 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] [2021-12-06 23:46:10,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:46:10,149 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2021-12-06 23:46:10,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:10,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609767232] [2021-12-06 23:46:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:10,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:10,195 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 23:46:10,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:10,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609767232] [2021-12-06 23:46:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609767232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:10,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:10,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:10,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733317126] [2021-12-06 23:46:10,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:10,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:10,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:10,199 INFO L87 Difference]: Start difference. First operand 1006 states and 1445 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:46:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:10,316 INFO L93 Difference]: Finished difference Result 1993 states and 2820 transitions. [2021-12-06 23:46:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:46:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-06 23:46:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:10,325 INFO L225 Difference]: With dead ends: 1993 [2021-12-06 23:46:10,325 INFO L226 Difference]: Without dead ends: 1991 [2021-12-06 23:46:10,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:46:10,326 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 139 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:10,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 321 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-12-06 23:46:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1102. [2021-12-06 23:46:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.3960036330608538) internal successors, (1537), 1101 states have internal predecessors, (1537), 0 states have call successors, (0), 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 23:46:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1537 transitions. [2021-12-06 23:46:10,382 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1537 transitions. Word has length 43 [2021-12-06 23:46:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:10,383 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1537 transitions. [2021-12-06 23:46:10,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:46:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1537 transitions. [2021-12-06 23:46:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 23:46:10,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:10,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:10,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:46:10,385 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2021-12-06 23:46:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211862317] [2021-12-06 23:46:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:10,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 23:46:10,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:10,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211862317] [2021-12-06 23:46:10,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211862317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:10,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:10,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:10,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788807989] [2021-12-06 23:46:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:10,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:10,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:10,435 INFO L87 Difference]: Start difference. First operand 1102 states and 1537 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:46:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:10,601 INFO L93 Difference]: Finished difference Result 4698 states and 6565 transitions. [2021-12-06 23:46:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:46:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 63 [2021-12-06 23:46:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:10,616 INFO L225 Difference]: With dead ends: 4698 [2021-12-06 23:46:10,616 INFO L226 Difference]: Without dead ends: 3620 [2021-12-06 23:46:10,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:46:10,619 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 192 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 306 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-12-06 23:46:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2178. [2021-12-06 23:46:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 1.3913642627468994) internal successors, (3029), 2177 states have internal predecessors, (3029), 0 states have call successors, (0), 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 23:46:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3029 transitions. [2021-12-06 23:46:10,729 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3029 transitions. Word has length 63 [2021-12-06 23:46:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:10,729 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 3029 transitions. [2021-12-06 23:46:10,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:46:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3029 transitions. [2021-12-06 23:46:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 23:46:10,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:10,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:46:10,731 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2021-12-06 23:46:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575540969] [2021-12-06 23:46:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:46:10,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:10,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575540969] [2021-12-06 23:46:10,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575540969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:10,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:10,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:10,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178891621] [2021-12-06 23:46:10,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:10,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:10,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:10,774 INFO L87 Difference]: Start difference. First operand 2178 states and 3029 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:46:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:10,994 INFO L93 Difference]: Finished difference Result 5774 states and 8057 transitions. [2021-12-06 23:46:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:46:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 63 [2021-12-06 23:46:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:11,021 INFO L225 Difference]: With dead ends: 5774 [2021-12-06 23:46:11,021 INFO L226 Difference]: Without dead ends: 4696 [2021-12-06 23:46:11,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:46:11,025 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 189 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:11,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 324 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2021-12-06 23:46:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3794. [2021-12-06 23:46:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 1.3838650145003955) internal successors, (5249), 3793 states have internal predecessors, (5249), 0 states have call successors, (0), 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 23:46:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5249 transitions. [2021-12-06 23:46:11,240 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5249 transitions. Word has length 63 [2021-12-06 23:46:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 3794 states and 5249 transitions. [2021-12-06 23:46:11,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:46:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5249 transitions. [2021-12-06 23:46:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 23:46:11,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:11,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:11,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:46:11,242 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2021-12-06 23:46:11,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790280119] [2021-12-06 23:46:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:11,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:46:11,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790280119] [2021-12-06 23:46:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790280119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:11,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:11,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:46:11,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934049180] [2021-12-06 23:46:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:46:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:46:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:46:11,282 INFO L87 Difference]: Start difference. First operand 3794 states and 5249 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 23:46:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:11,499 INFO L93 Difference]: Finished difference Result 6490 states and 9069 transitions. [2021-12-06 23:46:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:46:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 63 [2021-12-06 23:46:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:11,529 INFO L225 Difference]: With dead ends: 6490 [2021-12-06 23:46:11,529 INFO L226 Difference]: Without dead ends: 5592 [2021-12-06 23:46:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:46:11,533 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 188 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:11,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 303 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-12-06 23:46:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 4690. [2021-12-06 23:46:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 1.3872894007251013) internal successors, (6505), 4689 states have internal predecessors, (6505), 0 states have call successors, (0), 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 23:46:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6505 transitions. [2021-12-06 23:46:11,753 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6505 transitions. Word has length 63 [2021-12-06 23:46:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 6505 transitions. [2021-12-06 23:46:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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 23:46:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6505 transitions. [2021-12-06 23:46:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 23:46:11,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:11,755 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:46:11,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:46:11,755 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2021-12-06 23:46:11,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:11,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662013147] [2021-12-06 23:46:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:11,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:11,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662013147] [2021-12-06 23:46:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662013147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125605374] [2021-12-06 23:46:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:11,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:11,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:11,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:11,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:46:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 23:46:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:46:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:46:12,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125605374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:12,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:12,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 4] total 20 [2021-12-06 23:46:12,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266703034] [2021-12-06 23:46:12,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:12,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:46:12,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:46:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:46:12,486 INFO L87 Difference]: Start difference. First operand 4690 states and 6505 transitions. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 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 23:46:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:18,281 INFO L93 Difference]: Finished difference Result 53952 states and 74157 transitions. [2021-12-06 23:46:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 23:46:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 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 64 [2021-12-06 23:46:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:18,376 INFO L225 Difference]: With dead ends: 53952 [2021-12-06 23:46:18,377 INFO L226 Difference]: Without dead ends: 49286 [2021-12-06 23:46:18,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4277, Invalid=20529, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 23:46:18,396 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2272 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2272 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:18,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2272 Valid, 1331 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:46:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49286 states. [2021-12-06 23:46:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49286 to 26164. [2021-12-06 23:46:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26164 states, 26163 states have (on average 1.355463822956083) internal successors, (35463), 26163 states have internal predecessors, (35463), 0 states have call successors, (0), 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 23:46:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26164 states to 26164 states and 35463 transitions. [2021-12-06 23:46:19,743 INFO L78 Accepts]: Start accepts. Automaton has 26164 states and 35463 transitions. Word has length 64 [2021-12-06 23:46:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:19,743 INFO L470 AbstractCegarLoop]: Abstraction has 26164 states and 35463 transitions. [2021-12-06 23:46:19,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 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 23:46:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 26164 states and 35463 transitions. [2021-12-06 23:46:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:46:19,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:19,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:19,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:46:19,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:46:19,948 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2021-12-06 23:46:19,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:19,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094631585] [2021-12-06 23:46:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:19,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:20,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094631585] [2021-12-06 23:46:20,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094631585] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199201869] [2021-12-06 23:46:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:20,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:20,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:20,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:46:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:20,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:46:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:20,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:20,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199201869] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:20,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:20,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-06 23:46:20,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580718337] [2021-12-06 23:46:20,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:20,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:46:20,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:46:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:46:20,954 INFO L87 Difference]: Start difference. First operand 26164 states and 35463 transitions. Second operand has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 0 states have call successors, (0), 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 23:46:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:35,695 INFO L93 Difference]: Finished difference Result 205713 states and 272591 transitions. [2021-12-06 23:46:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-12-06 23:46:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 0 states have call successors, (0), 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 65 [2021-12-06 23:46:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:35,931 INFO L225 Difference]: With dead ends: 205713 [2021-12-06 23:46:35,931 INFO L226 Difference]: Without dead ends: 179573 [2021-12-06 23:46:35,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9174 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3869, Invalid=21571, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 23:46:35,981 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 4930 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4930 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:35,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4930 Valid, 1925 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:46:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179573 states. [2021-12-06 23:46:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179573 to 84198. [2021-12-06 23:46:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84198 states, 84197 states have (on average 1.3331116310557383) internal successors, (112244), 84197 states have internal predecessors, (112244), 0 states have call successors, (0), 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 23:46:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84198 states to 84198 states and 112244 transitions. [2021-12-06 23:46:41,813 INFO L78 Accepts]: Start accepts. Automaton has 84198 states and 112244 transitions. Word has length 65 [2021-12-06 23:46:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 84198 states and 112244 transitions. [2021-12-06 23:46:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 25 states have internal predecessors, (165), 0 states have call successors, (0), 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 23:46:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 84198 states and 112244 transitions. [2021-12-06 23:46:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:46:41,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:41,816 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:46:41,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:46:42,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:46:42,018 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2021-12-06 23:46:42,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410530156] [2021-12-06 23:46:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:42,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:42,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410530156] [2021-12-06 23:46:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410530156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:42,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:42,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:42,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555372676] [2021-12-06 23:46:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:42,070 INFO L87 Difference]: Start difference. First operand 84198 states and 112244 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:46:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:46,875 INFO L93 Difference]: Finished difference Result 168374 states and 224465 transitions. [2021-12-06 23:46:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-06 23:46:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:46,985 INFO L225 Difference]: With dead ends: 168374 [2021-12-06 23:46:46,985 INFO L226 Difference]: Without dead ends: 84200 [2021-12-06 23:46:47,031 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 23:46:47,032 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:47,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84200 states. [2021-12-06 23:46:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84200 to 82278. [2021-12-06 23:46:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82278 states, 82277 states have (on average 1.3058813520181825) internal successors, (107444), 82277 states have internal predecessors, (107444), 0 states have call successors, (0), 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 23:46:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82278 states to 82278 states and 107444 transitions. [2021-12-06 23:46:52,066 INFO L78 Accepts]: Start accepts. Automaton has 82278 states and 107444 transitions. Word has length 65 [2021-12-06 23:46:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:52,066 INFO L470 AbstractCegarLoop]: Abstraction has 82278 states and 107444 transitions. [2021-12-06 23:46:52,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:46:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 82278 states and 107444 transitions. [2021-12-06 23:46:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:46:52,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:52,068 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:46:52,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:46:52,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2021-12-06 23:46:52,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:52,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092683166] [2021-12-06 23:46:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:52,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:52,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092683166] [2021-12-06 23:46:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092683166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:52,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8519732] [2021-12-06 23:46:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:52,097 INFO L87 Difference]: Start difference. First operand 82278 states and 107444 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:46:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:54,702 INFO L93 Difference]: Finished difference Result 128594 states and 167691 transitions. [2021-12-06 23:46:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:54,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-06 23:46:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:54,756 INFO L225 Difference]: With dead ends: 128594 [2021-12-06 23:46:54,756 INFO L226 Difference]: Without dead ends: 46340 [2021-12-06 23:46:54,794 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 23:46:54,795 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 23 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:54,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 152 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46340 states. [2021-12-06 23:46:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46340 to 46338. [2021-12-06 23:46:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46338 states, 46337 states have (on average 1.272071994302609) internal successors, (58944), 46337 states have internal predecessors, (58944), 0 states have call successors, (0), 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 23:46:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46338 states to 46338 states and 58944 transitions. [2021-12-06 23:46:57,723 INFO L78 Accepts]: Start accepts. Automaton has 46338 states and 58944 transitions. Word has length 65 [2021-12-06 23:46:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:57,723 INFO L470 AbstractCegarLoop]: Abstraction has 46338 states and 58944 transitions. [2021-12-06 23:46:57,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:46:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 46338 states and 58944 transitions. [2021-12-06 23:46:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:46:57,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:57,725 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 23:46:57,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:46:57,725 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2021-12-06 23:46:57,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:57,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309996903] [2021-12-06 23:46:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:57,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:46:57,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:57,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309996903] [2021-12-06 23:46:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309996903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:46:57,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:46:57,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:46:57,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028638032] [2021-12-06 23:46:57,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:46:57,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:46:57,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:46:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:46:57,750 INFO L87 Difference]: Start difference. First operand 46338 states and 58944 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:46:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:58,887 INFO L93 Difference]: Finished difference Result 66398 states and 84374 transitions. [2021-12-06 23:46:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:46:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-06 23:46:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:58,910 INFO L225 Difference]: With dead ends: 66398 [2021-12-06 23:46:58,910 INFO L226 Difference]: Without dead ends: 20084 [2021-12-06 23:46:58,934 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 23:46:58,934 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 17 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:58,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 143 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:46:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20084 states. [2021-12-06 23:47:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20084 to 18705. [2021-12-06 23:47:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18705 states, 18704 states have (on average 1.2472733105218134) internal successors, (23329), 18704 states have internal predecessors, (23329), 0 states have call successors, (0), 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 23:47:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18705 states to 18705 states and 23329 transitions. [2021-12-06 23:47:00,114 INFO L78 Accepts]: Start accepts. Automaton has 18705 states and 23329 transitions. Word has length 65 [2021-12-06 23:47:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:00,114 INFO L470 AbstractCegarLoop]: Abstraction has 18705 states and 23329 transitions. [2021-12-06 23:47:00,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 23:47:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18705 states and 23329 transitions. [2021-12-06 23:47:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:47:00,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:00,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:00,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:47:00,116 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2021-12-06 23:47:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:00,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383878562] [2021-12-06 23:47:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:00,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:47:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:00,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383878562] [2021-12-06 23:47:00,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383878562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:47:00,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:47:00,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:47:00,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490523592] [2021-12-06 23:47:00,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:47:00,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:47:00,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:47:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:47:00,150 INFO L87 Difference]: Start difference. First operand 18705 states and 23329 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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 23:47:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:00,906 INFO L93 Difference]: Finished difference Result 31192 states and 39122 transitions. [2021-12-06 23:47:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:47:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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 65 [2021-12-06 23:47:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:00,920 INFO L225 Difference]: With dead ends: 31192 [2021-12-06 23:47:00,920 INFO L226 Difference]: Without dead ends: 12550 [2021-12-06 23:47:00,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:47:00,930 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 182 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:00,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 87 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:47:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12550 states. [2021-12-06 23:47:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12550 to 12550. [2021-12-06 23:47:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12550 states, 12549 states have (on average 1.2374691210455016) internal successors, (15529), 12549 states have internal predecessors, (15529), 0 states have call successors, (0), 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 23:47:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12550 states to 12550 states and 15529 transitions. [2021-12-06 23:47:01,667 INFO L78 Accepts]: Start accepts. Automaton has 12550 states and 15529 transitions. Word has length 65 [2021-12-06 23:47:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:01,668 INFO L470 AbstractCegarLoop]: Abstraction has 12550 states and 15529 transitions. [2021-12-06 23:47:01,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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 23:47:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 12550 states and 15529 transitions. [2021-12-06 23:47:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:47:01,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:01,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:47:01,670 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2021-12-06 23:47:01,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:01,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551424236] [2021-12-06 23:47:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:01,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:47:01,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551424236] [2021-12-06 23:47:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551424236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:47:01,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:47:01,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:47:01,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036278504] [2021-12-06 23:47:01,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:47:01,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:47:01,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:47:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:47:01,710 INFO L87 Difference]: Start difference. First operand 12550 states and 15529 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:47:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:02,383 INFO L93 Difference]: Finished difference Result 22111 states and 27352 transitions. [2021-12-06 23:47:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:47:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 65 [2021-12-06 23:47:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:02,394 INFO L225 Difference]: With dead ends: 22111 [2021-12-06 23:47:02,394 INFO L226 Difference]: Without dead ends: 9663 [2021-12-06 23:47:02,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:47:02,398 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 230 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:02,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 74 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:47:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9663 states. [2021-12-06 23:47:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9663 to 9663. [2021-12-06 23:47:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9663 states, 9662 states have (on average 1.212895880770027) internal successors, (11719), 9662 states have internal predecessors, (11719), 0 states have call successors, (0), 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 23:47:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 11719 transitions. [2021-12-06 23:47:03,007 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 11719 transitions. Word has length 65 [2021-12-06 23:47:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 9663 states and 11719 transitions. [2021-12-06 23:47:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:47:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 11719 transitions. [2021-12-06 23:47:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:47:03,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:03,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:03,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:47:03,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2021-12-06 23:47:03,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267574825] [2021-12-06 23:47:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:03,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:03,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:03,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267574825] [2021-12-06 23:47:03,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267574825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:03,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461325853] [2021-12-06 23:47:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:03,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:47:03,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:47:03,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:47:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 23:47:03,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:47:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461325853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:47:04,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:47:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-06 23:47:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020800893] [2021-12-06 23:47:04,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 23:47:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 23:47:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-12-06 23:47:04,645 INFO L87 Difference]: Start difference. First operand 9663 states and 11719 transitions. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:08,937 INFO L93 Difference]: Finished difference Result 36066 states and 44405 transitions. [2021-12-06 23:47:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 23:47:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:47:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:08,966 INFO L225 Difference]: With dead ends: 36066 [2021-12-06 23:47:08,966 INFO L226 Difference]: Without dead ends: 31890 [2021-12-06 23:47:08,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=775, Invalid=2885, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 23:47:08,975 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2784 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2784 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:08,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2784 Valid, 1997 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:47:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31890 states. [2021-12-06 23:47:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31890 to 9014. [2021-12-06 23:47:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9014 states, 9013 states have (on average 1.212248973704649) internal successors, (10926), 9013 states have internal predecessors, (10926), 0 states have call successors, (0), 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 23:47:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9014 states to 9014 states and 10926 transitions. [2021-12-06 23:47:09,823 INFO L78 Accepts]: Start accepts. Automaton has 9014 states and 10926 transitions. Word has length 66 [2021-12-06 23:47:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:09,824 INFO L470 AbstractCegarLoop]: Abstraction has 9014 states and 10926 transitions. [2021-12-06 23:47:09,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9014 states and 10926 transitions. [2021-12-06 23:47:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:47:09,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:09,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 23:47:10,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:10,026 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1325407888, now seen corresponding path program 1 times [2021-12-06 23:47:10,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:10,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562853505] [2021-12-06 23:47:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:10,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:10,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562853505] [2021-12-06 23:47:10,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562853505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:10,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47857431] [2021-12-06 23:47:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:10,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:10,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:47:10,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:47:10,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:47:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 23:47:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:47:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:11,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47857431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:47:13,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:47:13,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 19] total 48 [2021-12-06 23:47:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112471259] [2021-12-06 23:47:13,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:47:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:47:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:47:13,386 INFO L87 Difference]: Start difference. First operand 9014 states and 10926 transitions. Second operand has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:18,954 INFO L93 Difference]: Finished difference Result 18988 states and 22748 transitions. [2021-12-06 23:47:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 23:47:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:47:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:18,966 INFO L225 Difference]: With dead ends: 18988 [2021-12-06 23:47:18,966 INFO L226 Difference]: Without dead ends: 13405 [2021-12-06 23:47:18,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2349, Invalid=12171, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 23:47:18,973 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 1890 mSDsluCounter, 3797 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 3976 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:18,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 3976 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:47:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13405 states. [2021-12-06 23:47:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13405 to 5452. [2021-12-06 23:47:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 1.2260135754907358) internal successors, (6683), 5451 states have internal predecessors, (6683), 0 states have call successors, (0), 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 23:47:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 6683 transitions. [2021-12-06 23:47:19,569 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 6683 transitions. Word has length 66 [2021-12-06 23:47:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:19,569 INFO L470 AbstractCegarLoop]: Abstraction has 5452 states and 6683 transitions. [2021-12-06 23:47:19,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 6683 transitions. [2021-12-06 23:47:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:47:19,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:19,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:47:19,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:47:19,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 23:47:19,772 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1480155338, now seen corresponding path program 1 times [2021-12-06 23:47:19,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:19,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146545794] [2021-12-06 23:47:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:19,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:19,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146545794] [2021-12-06 23:47:19,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146545794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:19,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175035712] [2021-12-06 23:47:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:19,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:19,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:47:19,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:47:19,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:47:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:20,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:47:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:47:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:20,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:21,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175035712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:47:21,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:47:21,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2021-12-06 23:47:21,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873873241] [2021-12-06 23:47:21,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:21,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:47:21,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:47:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:47:21,325 INFO L87 Difference]: Start difference. First operand 5452 states and 6683 transitions. Second operand has 30 states, 30 states have (on average 5.933333333333334) internal successors, (178), 30 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:47:23,689 INFO L93 Difference]: Finished difference Result 9826 states and 11890 transitions. [2021-12-06 23:47:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 23:47:23,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.933333333333334) internal successors, (178), 30 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 23:47:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:47:23,696 INFO L225 Difference]: With dead ends: 9826 [2021-12-06 23:47:23,696 INFO L226 Difference]: Without dead ends: 7262 [2021-12-06 23:47:23,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=486, Invalid=1866, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 23:47:23,698 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 849 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:47:23,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 2117 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:47:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7262 states. [2021-12-06 23:47:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7262 to 4360. [2021-12-06 23:47:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 1.2227575131910988) internal successors, (5330), 4359 states have internal predecessors, (5330), 0 states have call successors, (0), 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 23:47:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 5330 transitions. [2021-12-06 23:47:24,242 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 5330 transitions. Word has length 68 [2021-12-06 23:47:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:47:24,243 INFO L470 AbstractCegarLoop]: Abstraction has 4360 states and 5330 transitions. [2021-12-06 23:47:24,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.933333333333334) internal successors, (178), 30 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:47:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 5330 transitions. [2021-12-06 23:47:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:47:24,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:47:24,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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 23:47:24,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:47:24,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:24,446 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:47:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:47:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash -960702800, now seen corresponding path program 1 times [2021-12-06 23:47:24,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:47:24,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180455172] [2021-12-06 23:47:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:24,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:47:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:24,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:47:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180455172] [2021-12-06 23:47:24,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180455172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7045304] [2021-12-06 23:47:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:47:24,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:47:24,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:47:24,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:47:24,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:47:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:47:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:47:24,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:47:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 73 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:43,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:47:57,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7045304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:47:57,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:47:57,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 22] total 53 [2021-12-06 23:47:57,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663115707] [2021-12-06 23:47:57,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:57,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 23:47:57,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 23:47:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2540, Unknown=7, NotChecked=0, Total=2756 [2021-12-06 23:47:57,450 INFO L87 Difference]: Start difference. First operand 4360 states and 5330 transitions. Second operand has 53 states, 53 states have (on average 5.867924528301887) internal successors, (311), 53 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:53:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:53:47,784 INFO L93 Difference]: Finished difference Result 30932 states and 37469 transitions. [2021-12-06 23:53:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-12-06 23:53:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.867924528301887) internal successors, (311), 53 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-06 23:53:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:53:47,811 INFO L225 Difference]: With dead ends: 30932 [2021-12-06 23:53:47,812 INFO L226 Difference]: Without dead ends: 27206 [2021-12-06 23:53:47,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18979 ImplicationChecksByTransitivity, 357.0s TimeCoverageRelationStatistics Valid=6564, Invalid=46510, Unknown=56, NotChecked=0, Total=53130 [2021-12-06 23:53:47,821 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 2034 mSDsluCounter, 8661 mSDsCounter, 0 mSdLazyCounter, 4008 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2034 SdHoareTripleChecker+Valid, 8882 SdHoareTripleChecker+Invalid, 4853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 4008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:53:47,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2034 Valid, 8882 Invalid, 4853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 4008 Invalid, 0 Unknown, 400 Unchecked, 10.3s Time] [2021-12-06 23:53:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27206 states. [2021-12-06 23:53:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27206 to 7893. [2021-12-06 23:53:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 1.2097060314242272) internal successors, (9547), 7892 states have internal predecessors, (9547), 0 states have call successors, (0), 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 23:53:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 9547 transitions. [2021-12-06 23:53:49,151 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 9547 transitions. Word has length 110 [2021-12-06 23:53:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:53:49,152 INFO L470 AbstractCegarLoop]: Abstraction has 7893 states and 9547 transitions. [2021-12-06 23:53:49,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.867924528301887) internal successors, (311), 53 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:53:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 9547 transitions. [2021-12-06 23:53:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:53:49,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:53:49,154 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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 23:53:49,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:53:49,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 23:53:49,356 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:53:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:53:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash 46060240, now seen corresponding path program 1 times [2021-12-06 23:53:49,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:53:49,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638427112] [2021-12-06 23:53:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:53:49,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:53:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:53:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:53:49,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:53:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638427112] [2021-12-06 23:53:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638427112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:53:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451547820] [2021-12-06 23:53:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:53:49,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:53:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:53:49,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:53:49,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:53:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:53:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:53:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:53:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:53:51,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:53:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:53:53,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451547820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:53:53,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:53:53,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2021-12-06 23:53:53,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648718139] [2021-12-06 23:53:53,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:53:53,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 23:53:53,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:53:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 23:53:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:53:53,609 INFO L87 Difference]: Start difference. First operand 7893 states and 9547 transitions. Second operand has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:12,609 INFO L93 Difference]: Finished difference Result 14972 states and 18106 transitions. [2021-12-06 23:54:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 23:54:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-06 23:54:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:12,618 INFO L225 Difference]: With dead ends: 14972 [2021-12-06 23:54:12,619 INFO L226 Difference]: Without dead ends: 8621 [2021-12-06 23:54:12,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=1366, Invalid=5440, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 23:54:12,624 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 2009 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2009 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:12,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2009 Valid, 1122 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 23:54:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8621 states. [2021-12-06 23:54:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8621 to 7863. [2021-12-06 23:54:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7863 states, 7862 states have (on average 1.1910455354871534) internal successors, (9364), 7862 states have internal predecessors, (9364), 0 states have call successors, (0), 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 23:54:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 9364 transitions. [2021-12-06 23:54:14,258 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 9364 transitions. Word has length 110 [2021-12-06 23:54:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:14,259 INFO L470 AbstractCegarLoop]: Abstraction has 7863 states and 9364 transitions. [2021-12-06 23:54:14,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.147058823529411) internal successors, (311), 33 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 9364 transitions. [2021-12-06 23:54:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:54:14,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:14,260 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 23:54:14,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:54:14,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 23:54:14,462 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:54:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 672030338, now seen corresponding path program 1 times [2021-12-06 23:54:14,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035390849] [2021-12-06 23:54:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:14,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:14,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:14,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035390849] [2021-12-06 23:54:14,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035390849] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695319663] [2021-12-06 23:54:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:14,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:14,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:14,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:54:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:54:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:18,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:56:05,820 WARN L227 SmtUtils]: Spent 1.69m on a formula simplification. DAG size of input: 8152 DAG size of output: 6364 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:56:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:56:31,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695319663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:56:31,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:56:31,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 56 [2021-12-06 23:56:31,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673226326] [2021-12-06 23:56:31,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:56:31,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 23:56:31,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:31,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 23:56:31,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 23:56:31,171 INFO L87 Difference]: Start difference. First operand 7863 states and 9364 transitions. Second operand has 56 states, 56 states have (on average 5.321428571428571) internal successors, (298), 56 states have internal predecessors, (298), 0 states have call successors, (0), 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 23:57:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:10,710 INFO L93 Difference]: Finished difference Result 29571 states and 35094 transitions. [2021-12-06 23:57:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-06 23:57:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.321428571428571) internal successors, (298), 56 states have internal predecessors, (298), 0 states have call successors, (0), 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 110 [2021-12-06 23:57:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:10,735 INFO L225 Difference]: With dead ends: 29571 [2021-12-06 23:57:10,735 INFO L226 Difference]: Without dead ends: 26362 [2021-12-06 23:57:10,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14961 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=3684, Invalid=42756, Unknown=0, NotChecked=0, Total=46440 [2021-12-06 23:57:10,743 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 3201 mSDsluCounter, 8763 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3201 SdHoareTripleChecker+Valid, 9019 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:10,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3201 Valid, 9019 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 23:57:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26362 states. [2021-12-06 23:57:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26362 to 13847. [2021-12-06 23:57:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13847 states, 13846 states have (on average 1.1912465694063268) internal successors, (16494), 13846 states have internal predecessors, (16494), 0 states have call successors, (0), 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 23:57:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13847 states to 13847 states and 16494 transitions. [2021-12-06 23:57:13,836 INFO L78 Accepts]: Start accepts. Automaton has 13847 states and 16494 transitions. Word has length 110 [2021-12-06 23:57:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:13,836 INFO L470 AbstractCegarLoop]: Abstraction has 13847 states and 16494 transitions. [2021-12-06 23:57:13,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.321428571428571) internal successors, (298), 56 states have internal predecessors, (298), 0 states have call successors, (0), 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 23:57:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 13847 states and 16494 transitions. [2021-12-06 23:57:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:57:13,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:13,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-12-06 23:57:13,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 23:57:14,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:14,040 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -473565361, now seen corresponding path program 1 times [2021-12-06 23:57:14,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425586475] [2021-12-06 23:57:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:14,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:14,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425586475] [2021-12-06 23:57:14,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425586475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:14,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485338953] [2021-12-06 23:57:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:14,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:14,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:14,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85867e09-2372-4ccb-b0ab-e4184ad56afc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:57:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:14,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:57:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:18,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:58:38,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485338953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:58:38,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:58:38,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 19] total 59 [2021-12-06 23:58:38,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966866463] [2021-12-06 23:58:38,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:58:38,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 23:58:38,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 23:58:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 23:58:38,569 INFO L87 Difference]: Start difference. First operand 13847 states and 16494 transitions. Second operand has 59 states, 59 states have (on average 5.237288135593221) internal successors, (309), 59 states have internal predecessors, (309), 0 states have call successors, (0), 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 23:59:39,345 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 160 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:00:37,742 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 174 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)