./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/break-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/break-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY --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 af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:48:11,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:48:11,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:48:11,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:48:11,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:48:11,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:48:11,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:48:11,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:48:11,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:48:11,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:48:11,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:48:11,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:48:11,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:48:11,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:48:11,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:48:11,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:48:11,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:48:11,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:48:11,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:48:11,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:48:11,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:48:11,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:48:11,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:48:11,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:48:11,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:48:11,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:48:11,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:48:11,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:48:11,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:48:11,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:48:11,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:48:11,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:48:11,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:48:11,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:48:11,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:48:11,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:48:11,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:48:11,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:48:11,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:48:11,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:48:11,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:48:11,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:48:11,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:48:11,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:48:11,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:48:11,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:48:11,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:48:11,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:48:11,443 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:48:11,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:48:11,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:48:11,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:48:11,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:48:11,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:48:11,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:48:11,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:48:11,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:48:11,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:48:11,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:48:11,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:48:11,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:48:11,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:48:11,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:48:11,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:48:11,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:11,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:48:11,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:48:11,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:48:11,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:48:11,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:48:11,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:48:11,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:48:11,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:48:11,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:48:11,451 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_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2021-11-07 07:48:11,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:48:11,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:48:11,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:48:11,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:48:11,774 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:48:11,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-07 07:48:11,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/data/1cf865ed6/f25b90c8cbca4c88ad4d1603a4000e83/FLAG6ba170994 [2021-11-07 07:48:12,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:48:12,317 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/sv-benchmarks/c/array-lopstr16/break-2.i [2021-11-07 07:48:12,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/data/1cf865ed6/f25b90c8cbca4c88ad4d1603a4000e83/FLAG6ba170994 [2021-11-07 07:48:12,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/data/1cf865ed6/f25b90c8cbca4c88ad4d1603a4000e83 [2021-11-07 07:48:12,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:48:12,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:48:12,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:12,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:48:12,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:48:12,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:12" (1/1) ... [2021-11-07 07:48:12,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e564f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:12, skipping insertion in model container [2021-11-07 07:48:12,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:12" (1/1) ... [2021-11-07 07:48:12,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:48:12,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:48:13,022 WARN L228 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_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-07 07:48:13,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:20,467 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:48:20,479 WARN L228 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_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2021-11-07 07:48:20,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:20,518 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:48:20,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20 WrapperNode [2021-11-07 07:48:20,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:20,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:20,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:48:20,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:48:20,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:20,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:48:20,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:48:20,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:48:20,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:48:20,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:48:20,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:48:20,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:48:20,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (1/1) ... [2021-11-07 07:48:20,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:20,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:48:20,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:48:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:48:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:48:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:48:20,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:48:20,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:48:20,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:48:20,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:48:20,993 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 07:48:20,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:20 BoogieIcfgContainer [2021-11-07 07:48:20,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:48:20,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:48:20,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:48:21,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:48:21,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:48:12" (1/3) ... [2021-11-07 07:48:21,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b2bc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:21, skipping insertion in model container [2021-11-07 07:48:21,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:20" (2/3) ... [2021-11-07 07:48:21,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b2bc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:21, skipping insertion in model container [2021-11-07 07:48:21,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:20" (3/3) ... [2021-11-07 07:48:21,012 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.i [2021-11-07 07:48:21,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:48:21,034 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:48:21,129 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:48:21,136 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 [2021-11-07 07:48:21,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:48:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:48:21,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:21,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:21,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-11-07 07:48:21,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:21,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301366887] [2021-11-07 07:48:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:21,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:21,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301366887] [2021-11-07 07:48:21,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301366887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:21,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:21,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:48:21,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481196145] [2021-11-07 07:48:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:48:21,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:48:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:48:21,371 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:21,386 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-07 07:48:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:48:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:48:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:21,396 INFO L225 Difference]: With dead ends: 29 [2021-11-07 07:48:21,396 INFO L226 Difference]: Without dead ends: 13 [2021-11-07 07:48:21,399 INFO L786 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 [2021-11-07 07:48:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-07 07:48:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-07 07:48:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-07 07:48:21,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-07 07:48:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:21,432 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-07 07:48:21,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-07 07:48:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:48:21,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:21,434 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:21,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:48:21,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-11-07 07:48:21,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:21,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115846664] [2021-11-07 07:48:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:21,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:21,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:21,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115846664] [2021-11-07 07:48:21,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115846664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:21,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:21,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:48:21,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083312866] [2021-11-07 07:48:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:48:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:48:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:48:21,489 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:21,524 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-07 07:48:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:48:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:48:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:21,526 INFO L225 Difference]: With dead ends: 31 [2021-11-07 07:48:21,526 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:48:21,527 INFO L786 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 [2021-11-07 07:48:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:48:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-11-07 07:48:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-07 07:48:21,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2021-11-07 07:48:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:21,532 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-07 07:48:21,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-07 07:48:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:48:21,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:21,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:21,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:48:21,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-11-07 07:48:21,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:21,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969736494] [2021-11-07 07:48:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:21,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:21,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:21,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969736494] [2021-11-07 07:48:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969736494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168939883] [2021-11-07 07:48:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:21,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:21,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:21,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:48:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:48:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:21,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168939883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:21,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:21,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:48:21,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041807736] [2021-11-07 07:48:21,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:48:21,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:48:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:48:21,813 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:21,902 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-07 07:48:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:48:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 07:48:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:21,907 INFO L225 Difference]: With dead ends: 43 [2021-11-07 07:48:21,908 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 07:48:21,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:48:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 07:48:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-07 07:48:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-07 07:48:21,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-11-07 07:48:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:21,915 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-07 07:48:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-07 07:48:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:48:21,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:21,917 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:21,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:22,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:22,140 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -383963755, now seen corresponding path program 2 times [2021-11-07 07:48:22,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:22,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822435349] [2021-11-07 07:48:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:22,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:48:22,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:22,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822435349] [2021-11-07 07:48:22,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822435349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:22,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:22,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:48:22,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071703579] [2021-11-07 07:48:22,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:48:22,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:48:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:48:22,199 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:22,233 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-11-07 07:48:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:48:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 14 [2021-11-07 07:48:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:22,235 INFO L225 Difference]: With dead ends: 44 [2021-11-07 07:48:22,235 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 07:48:22,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:48:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 07:48:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-07 07:48:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 07:48:22,241 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-11-07 07:48:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 07:48:22,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 07:48:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:48:22,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:22,243 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:48:22,243 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1774448108, now seen corresponding path program 1 times [2021-11-07 07:48:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:22,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852391633] [2021-11-07 07:48:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:22,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:22,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:22,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852391633] [2021-11-07 07:48:22,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852391633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:22,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197594971] [2021-11-07 07:48:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:22,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:22,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:48:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:22,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:48:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197594971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:22,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:22,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-07 07:48:22,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343060535] [2021-11-07 07:48:22,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:48:22,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:48:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:48:22,631 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:22,897 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-07 07:48:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:48:22,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 15 [2021-11-07 07:48:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:22,901 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:48:22,901 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 07:48:22,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:48:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 07:48:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-11-07 07:48:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-07 07:48:22,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 15 [2021-11-07 07:48:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:22,923 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-07 07:48:22,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-07 07:48:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:48:22,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:22,924 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:22,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:23,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:23,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash -165523003, now seen corresponding path program 1 times [2021-11-07 07:48:23,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:23,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342932162] [2021-11-07 07:48:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:23,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:23,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:23,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342932162] [2021-11-07 07:48:23,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342932162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550768479] [2021-11-07 07:48:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:23,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:23,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:23,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:48:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:23,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:48:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550768479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:23,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 07:48:23,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419713345] [2021-11-07 07:48:23,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:48:23,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:48:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:48:23,434 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-11-07 07:48:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:23,500 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-11-07 07:48:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:48:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 23 [2021-11-07 07:48:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:23,502 INFO L225 Difference]: With dead ends: 71 [2021-11-07 07:48:23,503 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:48:23,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:48:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:48:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-11-07 07:48:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-07 07:48:23,524 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2021-11-07 07:48:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:23,524 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-07 07:48:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-11-07 07:48:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-07 07:48:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:48:23,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:23,527 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:23,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:23,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:48:23,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1319103615, now seen corresponding path program 2 times [2021-11-07 07:48:23,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:23,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724021413] [2021-11-07 07:48:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:23,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:23,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:23,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724021413] [2021-11-07 07:48:23,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724021413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:23,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829511650] [2021-11-07 07:48:23,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:23,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:23,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:48:23,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:23,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:48:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:24,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829511650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:24,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:24,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 07:48:24,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372258724] [2021-11-07 07:48:24,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:48:24,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:48:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:48:24,024 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:24,102 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-07 07:48:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:48:24,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 26 [2021-11-07 07:48:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:24,104 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:48:24,104 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 07:48:24,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:48:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 07:48:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-11-07 07:48:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-07 07:48:24,111 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 26 [2021-11-07 07:48:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:24,111 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-07 07:48:24,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-07 07:48:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:48:24,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:24,113 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:24,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:24,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:24,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash 257466245, now seen corresponding path program 3 times [2021-11-07 07:48:24,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:24,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722751604] [2021-11-07 07:48:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:24,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:24,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:24,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722751604] [2021-11-07 07:48:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722751604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:24,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485176138] [2021-11-07 07:48:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:24,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:24,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:24,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:48:24,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:48:24,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:48:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:24,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485176138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:24,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:24,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:48:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636496759] [2021-11-07 07:48:24,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:48:24,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:48:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:48:24,669 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:24,749 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-07 07:48:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:48:24,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-07 07:48:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:24,751 INFO L225 Difference]: With dead ends: 101 [2021-11-07 07:48:24,751 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:48:24,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:48:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:48:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-11-07 07:48:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-07 07:48:24,775 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 29 [2021-11-07 07:48:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:24,776 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-07 07:48:24,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-07 07:48:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:48:24,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:24,778 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:24,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:24,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:48:24,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1157744319, now seen corresponding path program 4 times [2021-11-07 07:48:24,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:24,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215416754] [2021-11-07 07:48:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:25,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:25,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215416754] [2021-11-07 07:48:25,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215416754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:25,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386546180] [2021-11-07 07:48:25,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:25,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:25,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:25,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:48:25,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:25,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:48:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386546180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:25,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:25,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:48:25,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092104130] [2021-11-07 07:48:25,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:48:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:48:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:25,366 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:25,460 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-07 07:48:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:48:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 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 32 [2021-11-07 07:48:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:25,462 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:48:25,462 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:48:25,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:48:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-07 07:48:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-07 07:48:25,476 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 32 [2021-11-07 07:48:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:25,478 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-07 07:48:25,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-07 07:48:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:48:25,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:25,483 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:25,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:25,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:25,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:25,699 INFO L85 PathProgramCache]: Analyzing trace with hash -728916667, now seen corresponding path program 5 times [2021-11-07 07:48:25,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:25,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795510686] [2021-11-07 07:48:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:25,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:25,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:25,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795510686] [2021-11-07 07:48:25,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795510686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:25,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661125272] [2021-11-07 07:48:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:25,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:25,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:25,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:48:25,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 07:48:25,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:48:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661125272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:26,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:26,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:48:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897854695] [2021-11-07 07:48:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:48:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:48:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:48:26,081 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:26,165 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-11-07 07:48:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:48:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 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 35 [2021-11-07 07:48:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:26,167 INFO L225 Difference]: With dead ends: 131 [2021-11-07 07:48:26,167 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 07:48:26,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:48:26,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 07:48:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-11-07 07:48:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.125) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-11-07 07:48:26,186 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 35 [2021-11-07 07:48:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:26,187 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-11-07 07:48:26,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-11-07 07:48:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:48:26,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:26,193 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:26,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:48:26,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1990652159, now seen corresponding path program 6 times [2021-11-07 07:48:26,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:26,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286459681] [2021-11-07 07:48:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:26,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:26,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:26,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286459681] [2021-11-07 07:48:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286459681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:26,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616840644] [2021-11-07 07:48:26,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:26,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:26,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:48:26,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 07:48:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:48:26,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:26,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616840644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:26,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:26,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:48:26,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551410626] [2021-11-07 07:48:26,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:48:26,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:48:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:48:26,982 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-11-07 07:48:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:27,116 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-11-07 07:48:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:48:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 38 [2021-11-07 07:48:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:27,118 INFO L225 Difference]: With dead ends: 146 [2021-11-07 07:48:27,119 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 07:48:27,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:48:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 07:48:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-11-07 07:48:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.125) internal successors, (90), 80 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-11-07 07:48:27,129 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 38 [2021-11-07 07:48:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:27,129 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-11-07 07:48:27,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2021-11-07 07:48:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-11-07 07:48:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:48:27,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:27,132 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:27,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:27,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:48:27,359 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash 402475781, now seen corresponding path program 7 times [2021-11-07 07:48:27,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:27,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779005180] [2021-11-07 07:48:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:27,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:27,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:27,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779005180] [2021-11-07 07:48:27,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779005180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:27,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530412772] [2021-11-07 07:48:27,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:27,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:27,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:27,511 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:27,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:48:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:48:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530412772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:27,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 07:48:27,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782100715] [2021-11-07 07:48:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:48:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:48:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:48:27,788 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-11-07 07:48:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:27,899 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2021-11-07 07:48:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:48:27,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 41 [2021-11-07 07:48:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:27,901 INFO L225 Difference]: With dead ends: 161 [2021-11-07 07:48:27,902 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 07:48:27,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:48:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 07:48:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2021-11-07 07:48:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-07 07:48:27,908 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 41 [2021-11-07 07:48:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:27,909 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-07 07:48:27,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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) [2021-11-07 07:48:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-07 07:48:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:48:27,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:27,910 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:27,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:28,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:48:28,127 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash 399731519, now seen corresponding path program 8 times [2021-11-07 07:48:28,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:28,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714465506] [2021-11-07 07:48:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:28,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:28,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:28,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714465506] [2021-11-07 07:48:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714465506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:28,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948839584] [2021-11-07 07:48:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:28,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:28,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:28,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:48:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:48:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:28,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948839584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:28,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:28,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 07:48:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275141625] [2021-11-07 07:48:28,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:48:28,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:48:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:48:28,565 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:28,685 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2021-11-07 07:48:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:48:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 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 44 [2021-11-07 07:48:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:28,687 INFO L225 Difference]: With dead ends: 176 [2021-11-07 07:48:28,687 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 07:48:28,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:48:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 07:48:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-11-07 07:48:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-11-07 07:48:28,694 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 44 [2021-11-07 07:48:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:28,694 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-11-07 07:48:28,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-11-07 07:48:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:48:28,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:28,696 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:28,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:28,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:48:28,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash 249800901, now seen corresponding path program 9 times [2021-11-07 07:48:28,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:28,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096892100] [2021-11-07 07:48:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:28,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:29,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:29,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096892100] [2021-11-07 07:48:29,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096892100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:29,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175808087] [2021-11-07 07:48:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:29,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:29,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:29,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:29,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:48:29,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-07 07:48:29,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:48:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:29,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175808087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:29,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:29,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:48:29,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982707249] [2021-11-07 07:48:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:29,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:29,463 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:29,593 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-07 07:48:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:48:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 07:48:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:29,595 INFO L225 Difference]: With dead ends: 191 [2021-11-07 07:48:29,595 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 07:48:29,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 07:48:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2021-11-07 07:48:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-07 07:48:29,602 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 47 [2021-11-07 07:48:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:29,603 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-07 07:48:29,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-07 07:48:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:48:29,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:29,604 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:29,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:29,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:48:29,828 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash 432747903, now seen corresponding path program 10 times [2021-11-07 07:48:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:29,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617275651] [2021-11-07 07:48:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:29,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:30,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:30,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617275651] [2021-11-07 07:48:30,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617275651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:30,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109989228] [2021-11-07 07:48:30,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:30,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:30,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:30,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:30,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:48:30,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:48:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:30,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109989228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:30,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:30,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:48:30,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249820885] [2021-11-07 07:48:30,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:48:30,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:48:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:30,372 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:30,515 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2021-11-07 07:48:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:48:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 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 50 [2021-11-07 07:48:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:30,517 INFO L225 Difference]: With dead ends: 206 [2021-11-07 07:48:30,517 INFO L226 Difference]: Without dead ends: 141 [2021-11-07 07:48:30,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-07 07:48:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-11-07 07:48:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.125) internal successors, (126), 112 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-11-07 07:48:30,524 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 50 [2021-11-07 07:48:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:30,525 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-11-07 07:48:30,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-11-07 07:48:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:48:30,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:30,526 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:30,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:48:30,754 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 293385861, now seen corresponding path program 11 times [2021-11-07 07:48:30,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:30,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269595410] [2021-11-07 07:48:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:30,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:30,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:30,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269595410] [2021-11-07 07:48:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269595410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:30,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125882172] [2021-11-07 07:48:30,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:30,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:30,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:30,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:30,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:48:31,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-07 07:48:31,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:48:31,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:31,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125882172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:31,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:31,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:48:31,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068453007] [2021-11-07 07:48:31,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:31,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:31,377 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:31,554 INFO L93 Difference]: Finished difference Result 221 states and 237 transitions. [2021-11-07 07:48:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:48:31,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 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 53 [2021-11-07 07:48:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:31,557 INFO L225 Difference]: With dead ends: 221 [2021-11-07 07:48:31,557 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 07:48:31,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 07:48:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2021-11-07 07:48:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-11-07 07:48:31,567 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 53 [2021-11-07 07:48:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-11-07 07:48:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-11-07 07:48:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:48:31,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:31,569 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:31,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:31,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:48:31,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1792167871, now seen corresponding path program 12 times [2021-11-07 07:48:31,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:31,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813776039] [2021-11-07 07:48:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:31,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:32,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:32,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813776039] [2021-11-07 07:48:32,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813776039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:32,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125574112] [2021-11-07 07:48:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:32,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:32,014 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:48:32,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 07:48:32,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:32,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125574112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:32,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:32,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:48:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447214494] [2021-11-07 07:48:32,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:32,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:32,670 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:32,872 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2021-11-07 07:48:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:48:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2021-11-07 07:48:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:32,874 INFO L225 Difference]: With dead ends: 236 [2021-11-07 07:48:32,874 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 07:48:32,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 07:48:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2021-11-07 07:48:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-11-07 07:48:32,888 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 56 [2021-11-07 07:48:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:32,888 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-11-07 07:48:32,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-11-07 07:48:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 07:48:32,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:32,890 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:32,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:33,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:33,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1527018565, now seen corresponding path program 13 times [2021-11-07 07:48:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:33,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984865349] [2021-11-07 07:48:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:33,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:33,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:33,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984865349] [2021-11-07 07:48:33,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984865349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:33,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754127911] [2021-11-07 07:48:33,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:33,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:33,341 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:48:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:33,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754127911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:33,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:33,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:48:33,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678499186] [2021-11-07 07:48:33,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:48:33,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:48:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:48:33,782 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2021-11-07 07:48:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:33,975 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2021-11-07 07:48:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:48:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 59 [2021-11-07 07:48:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:33,977 INFO L225 Difference]: With dead ends: 251 [2021-11-07 07:48:33,977 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 07:48:33,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:48:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 07:48:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 137. [2021-11-07 07:48:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.125) internal successors, (153), 136 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2021-11-07 07:48:33,987 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 59 [2021-11-07 07:48:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:33,987 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2021-11-07 07:48:33,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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) [2021-11-07 07:48:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2021-11-07 07:48:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:48:33,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:33,989 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:34,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:34,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:48:34,195 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash 908900863, now seen corresponding path program 14 times [2021-11-07 07:48:34,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:34,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806913637] [2021-11-07 07:48:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:34,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:34,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:34,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806913637] [2021-11-07 07:48:34,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806913637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:34,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034915037] [2021-11-07 07:48:34,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:34,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:34,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:34,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:48:34,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:48:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:34,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034915037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:34,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:34,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:48:34,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435881609] [2021-11-07 07:48:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:48:34,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:48:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:48:34,943 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:35,105 INFO L93 Difference]: Finished difference Result 266 states and 285 transitions. [2021-11-07 07:48:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:48:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 07:48:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:35,108 INFO L225 Difference]: With dead ends: 266 [2021-11-07 07:48:35,108 INFO L226 Difference]: Without dead ends: 181 [2021-11-07 07:48:35,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:48:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-07 07:48:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2021-11-07 07:48:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-07 07:48:35,118 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 62 [2021-11-07 07:48:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-07 07:48:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-07 07:48:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:48:35,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:35,120 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:35,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:35,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:35,347 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -910761467, now seen corresponding path program 15 times [2021-11-07 07:48:35,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:35,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460028780] [2021-11-07 07:48:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:35,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:35,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:35,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460028780] [2021-11-07 07:48:35,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460028780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:35,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862086657] [2021-11-07 07:48:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:35,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:35,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:35,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:48:36,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 07:48:36,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:36,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:48:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:36,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862086657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:36,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:36,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:48:36,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879453592] [2021-11-07 07:48:36,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:48:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:48:36,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:48:36,367 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:36,563 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2021-11-07 07:48:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:48:36,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2021-11-07 07:48:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:36,566 INFO L225 Difference]: With dead ends: 281 [2021-11-07 07:48:36,566 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 07:48:36,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:48:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 07:48:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2021-11-07 07:48:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.125) internal successors, (171), 152 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) [2021-11-07 07:48:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-11-07 07:48:36,577 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 65 [2021-11-07 07:48:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:36,578 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-11-07 07:48:36,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-11-07 07:48:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:48:36,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:36,580 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:36,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:36,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:36,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:36,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 605975615, now seen corresponding path program 16 times [2021-11-07 07:48:36,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:36,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719326795] [2021-11-07 07:48:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:36,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:37,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719326795] [2021-11-07 07:48:37,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719326795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:37,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615971638] [2021-11-07 07:48:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:37,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:37,065 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:37,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:48:37,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:48:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615971638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:37,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:37,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:48:37,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538073265] [2021-11-07 07:48:37,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:48:37,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:48:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:48:37,574 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:37,794 INFO L93 Difference]: Finished difference Result 296 states and 317 transitions. [2021-11-07 07:48:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:48:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:48:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:37,799 INFO L225 Difference]: With dead ends: 296 [2021-11-07 07:48:37,799 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 07:48:37,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:48:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 07:48:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 161. [2021-11-07 07:48:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.125) internal successors, (180), 160 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2021-11-07 07:48:37,823 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 68 [2021-11-07 07:48:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:37,824 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2021-11-07 07:48:37,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2021-11-07 07:48:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:48:37,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:37,826 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:37,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:38,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:48:38,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1630535739, now seen corresponding path program 17 times [2021-11-07 07:48:38,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:38,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894696725] [2021-11-07 07:48:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:38,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:38,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894696725] [2021-11-07 07:48:38,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894696725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348197458] [2021-11-07 07:48:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:38,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:38,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:38,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:48:38,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-07 07:48:38,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:48:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:39,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348197458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:39,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:39,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:48:39,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969627400] [2021-11-07 07:48:39,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:48:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:48:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:48:39,150 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:39,396 INFO L93 Difference]: Finished difference Result 311 states and 333 transitions. [2021-11-07 07:48:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:48:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2021-11-07 07:48:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:39,398 INFO L225 Difference]: With dead ends: 311 [2021-11-07 07:48:39,398 INFO L226 Difference]: Without dead ends: 211 [2021-11-07 07:48:39,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:48:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-07 07:48:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2021-11-07 07:48:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.125) internal successors, (189), 168 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2021-11-07 07:48:39,408 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 71 [2021-11-07 07:48:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:39,408 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2021-11-07 07:48:39,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2021-11-07 07:48:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:48:39,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:39,409 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:39,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:39,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:48:39,615 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1712619905, now seen corresponding path program 18 times [2021-11-07 07:48:39,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:39,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76751017] [2021-11-07 07:48:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:39,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:39,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:39,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76751017] [2021-11-07 07:48:39,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76751017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:39,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317506459] [2021-11-07 07:48:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:39,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:39,862 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:39,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:48:41,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-07 07:48:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:48:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:41,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317506459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:41,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:41,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 07:48:41,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445263529] [2021-11-07 07:48:41,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:48:41,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:48:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:48:41,437 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,657 INFO L93 Difference]: Finished difference Result 326 states and 349 transitions. [2021-11-07 07:48:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:48:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-11-07 07:48:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,660 INFO L225 Difference]: With dead ends: 326 [2021-11-07 07:48:41,660 INFO L226 Difference]: Without dead ends: 221 [2021-11-07 07:48:41,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:48:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-07 07:48:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2021-11-07 07:48:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.125) internal successors, (198), 176 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2021-11-07 07:48:41,677 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 74 [2021-11-07 07:48:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2021-11-07 07:48:41,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2021-11-07 07:48:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:48:41,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,679 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:41,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:48:41,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1049349509, now seen corresponding path program 19 times [2021-11-07 07:48:41,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455589786] [2021-11-07 07:48:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:42,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:42,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455589786] [2021-11-07 07:48:42,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455589786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848823281] [2021-11-07 07:48:42,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:42,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:42,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:42,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:48:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:48:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:42,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848823281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:42,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-07 07:48:42,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45966688] [2021-11-07 07:48:42,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:48:42,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:48:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:48:42,725 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:42,941 INFO L93 Difference]: Finished difference Result 341 states and 365 transitions. [2021-11-07 07:48:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:48:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 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 77 [2021-11-07 07:48:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:42,944 INFO L225 Difference]: With dead ends: 341 [2021-11-07 07:48:42,944 INFO L226 Difference]: Without dead ends: 231 [2021-11-07 07:48:42,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:48:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-07 07:48:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 185. [2021-11-07 07:48:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.125) internal successors, (207), 184 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2021-11-07 07:48:42,953 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 77 [2021-11-07 07:48:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:42,954 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2021-11-07 07:48:42,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2021-11-07 07:48:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:48:42,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:42,955 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:42,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:43,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:43,159 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -103294785, now seen corresponding path program 20 times [2021-11-07 07:48:43,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:43,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637234400] [2021-11-07 07:48:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:43,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:43,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:43,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637234400] [2021-11-07 07:48:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637234400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935125339] [2021-11-07 07:48:43,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:43,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:43,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:43,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:48:43,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:43,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:48:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:44,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935125339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:44,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 07:48:44,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154357153] [2021-11-07 07:48:44,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:48:44,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:44,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:48:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:48:44,149 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:44,400 INFO L93 Difference]: Finished difference Result 356 states and 381 transitions. [2021-11-07 07:48:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:48:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-11-07 07:48:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:44,402 INFO L225 Difference]: With dead ends: 356 [2021-11-07 07:48:44,402 INFO L226 Difference]: Without dead ends: 241 [2021-11-07 07:48:44,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:48:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-07 07:48:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 193. [2021-11-07 07:48:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.125) internal successors, (216), 192 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2021-11-07 07:48:44,421 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 80 [2021-11-07 07:48:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:44,422 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2021-11-07 07:48:44,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2021-11-07 07:48:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 07:48:44,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:44,425 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:44,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:44,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:48:44,650 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash -265925819, now seen corresponding path program 21 times [2021-11-07 07:48:44,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:44,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281299413] [2021-11-07 07:48:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:44,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:45,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281299413] [2021-11-07 07:48:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281299413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627483067] [2021-11-07 07:48:45,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:45,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:45,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:45,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:48:47,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-07 07:48:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:48:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627483067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:47,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:47,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-07 07:48:47,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800011319] [2021-11-07 07:48:47,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:48:47,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:48:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:48:47,706 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:47,984 INFO L93 Difference]: Finished difference Result 371 states and 397 transitions. [2021-11-07 07:48:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:48:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 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 83 [2021-11-07 07:48:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:47,986 INFO L225 Difference]: With dead ends: 371 [2021-11-07 07:48:47,987 INFO L226 Difference]: Without dead ends: 251 [2021-11-07 07:48:47,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:48:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-07 07:48:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 201. [2021-11-07 07:48:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.125) internal successors, (225), 200 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-11-07 07:48:48,002 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 83 [2021-11-07 07:48:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:48,005 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-11-07 07:48:48,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 27 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-11-07 07:48:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:48:48,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:48,009 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:48,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 07:48:48,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:48,230 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash -483949825, now seen corresponding path program 22 times [2021-11-07 07:48:48,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:48,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140696531] [2021-11-07 07:48:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:48,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:48,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:48,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140696531] [2021-11-07 07:48:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140696531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749375563] [2021-11-07 07:48:48,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:48,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:48,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:48,655 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:48,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:48:49,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:48:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:49,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749375563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:49,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 07:48:49,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131845173] [2021-11-07 07:48:49,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:48:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:49,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:48:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:48:49,372 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:49,635 INFO L93 Difference]: Finished difference Result 386 states and 413 transitions. [2021-11-07 07:48:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:48:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 07:48:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:49,639 INFO L225 Difference]: With dead ends: 386 [2021-11-07 07:48:49,639 INFO L226 Difference]: Without dead ends: 261 [2021-11-07 07:48:49,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:48:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-07 07:48:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-11-07 07:48:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.125) internal successors, (234), 208 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2021-11-07 07:48:49,651 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 86 [2021-11-07 07:48:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:49,652 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2021-11-07 07:48:49,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2021-11-07 07:48:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:48:49,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:49,656 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:49,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:49,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:48:49,871 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1646561019, now seen corresponding path program 23 times [2021-11-07 07:48:49,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:49,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736328748] [2021-11-07 07:48:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:49,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:50,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:50,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736328748] [2021-11-07 07:48:50,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736328748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:50,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236538573] [2021-11-07 07:48:50,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:50,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:50,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:50,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:48:51,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-07 07:48:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:48:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:51,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236538573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:51,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:51,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-07 07:48:51,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084297529] [2021-11-07 07:48:51,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:48:51,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:48:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:48:51,452 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:51,733 INFO L93 Difference]: Finished difference Result 401 states and 429 transitions. [2021-11-07 07:48:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:48:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-11-07 07:48:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:51,735 INFO L225 Difference]: With dead ends: 401 [2021-11-07 07:48:51,736 INFO L226 Difference]: Without dead ends: 271 [2021-11-07 07:48:51,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:48:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-07 07:48:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 217. [2021-11-07 07:48:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.125) internal successors, (243), 216 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-11-07 07:48:51,746 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 89 [2021-11-07 07:48:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-11-07 07:48:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-11-07 07:48:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:48:51,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:51,748 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:51,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:51,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:48:51,966 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1914600767, now seen corresponding path program 24 times [2021-11-07 07:48:51,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:51,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201921380] [2021-11-07 07:48:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:51,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:48:52,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:52,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201921380] [2021-11-07 07:48:52,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201921380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:52,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820770227] [2021-11-07 07:48:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:52,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:52,491 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:52,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:49:00,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-07 07:49:00,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:49:00,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:01,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820770227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:01,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:01,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 07:49:01,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327629141] [2021-11-07 07:49:01,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:49:01,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:49:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:49:01,094 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 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) [2021-11-07 07:49:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:01,404 INFO L93 Difference]: Finished difference Result 416 states and 445 transitions. [2021-11-07 07:49:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:49:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 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) Word has length 92 [2021-11-07 07:49:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:01,406 INFO L225 Difference]: With dead ends: 416 [2021-11-07 07:49:01,407 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 07:49:01,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:49:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 07:49:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 225. [2021-11-07 07:49:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.125) internal successors, (252), 224 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2021-11-07 07:49:01,418 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 92 [2021-11-07 07:49:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:01,419 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2021-11-07 07:49:01,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 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) [2021-11-07 07:49:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2021-11-07 07:49:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:49:01,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:01,421 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:01,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:01,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:49:01,646 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1796778299, now seen corresponding path program 25 times [2021-11-07 07:49:01,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:01,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064909297] [2021-11-07 07:49:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:01,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:02,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:02,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064909297] [2021-11-07 07:49:02,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064909297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:02,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624231535] [2021-11-07 07:49:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:02,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:02,139 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:02,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:49:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:49:02,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:03,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624231535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:03,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:03,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-07 07:49:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599007172] [2021-11-07 07:49:03,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:49:03,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:49:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:49:03,142 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:03,415 INFO L93 Difference]: Finished difference Result 431 states and 461 transitions. [2021-11-07 07:49:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:49:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 07:49:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:03,420 INFO L225 Difference]: With dead ends: 431 [2021-11-07 07:49:03,420 INFO L226 Difference]: Without dead ends: 291 [2021-11-07 07:49:03,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:49:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-07 07:49:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 233. [2021-11-07 07:49:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.125) internal successors, (261), 232 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2021-11-07 07:49:03,431 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 95 [2021-11-07 07:49:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:03,432 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2021-11-07 07:49:03,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2021-11-07 07:49:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:49:03,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:03,433 INFO L513 BasicCegarLoop]: trace histogram [29, 28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:03,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:03,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:03,643 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2147432577, now seen corresponding path program 26 times [2021-11-07 07:49:03,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:03,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538381922] [2021-11-07 07:49:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:03,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:04,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:04,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538381922] [2021-11-07 07:49:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538381922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:04,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814942844] [2021-11-07 07:49:04,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:04,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:04,159 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:49:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:04,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:49:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:05,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814942844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:05,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:05,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 07:49:05,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586346881] [2021-11-07 07:49:05,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:49:05,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:05,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:49:05,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:49:05,016 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:05,329 INFO L93 Difference]: Finished difference Result 446 states and 477 transitions. [2021-11-07 07:49:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:49:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 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 98 [2021-11-07 07:49:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:05,332 INFO L225 Difference]: With dead ends: 446 [2021-11-07 07:49:05,332 INFO L226 Difference]: Without dead ends: 301 [2021-11-07 07:49:05,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:49:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-07 07:49:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 241. [2021-11-07 07:49:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.125) internal successors, (270), 240 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2021-11-07 07:49:05,343 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 98 [2021-11-07 07:49:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2021-11-07 07:49:05,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2021-11-07 07:49:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:49:05,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:05,346 INFO L513 BasicCegarLoop]: trace histogram [30, 29, 29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:05,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:05,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:05,566 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1166402693, now seen corresponding path program 27 times [2021-11-07 07:49:05,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:05,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436078611] [2021-11-07 07:49:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:05,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:06,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:06,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436078611] [2021-11-07 07:49:06,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436078611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:06,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055787679] [2021-11-07 07:49:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:06,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:06,144 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:06,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:49:17,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 07:49:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:49:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:18,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055787679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:18,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:18,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-07 07:49:18,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065740132] [2021-11-07 07:49:18,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:49:18,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:49:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:49:18,007 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:18,336 INFO L93 Difference]: Finished difference Result 461 states and 493 transitions. [2021-11-07 07:49:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:49:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 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 101 [2021-11-07 07:49:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:18,340 INFO L225 Difference]: With dead ends: 461 [2021-11-07 07:49:18,340 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 07:49:18,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:49:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 07:49:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 249. [2021-11-07 07:49:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.125) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-11-07 07:49:18,357 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 101 [2021-11-07 07:49:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:18,358 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-11-07 07:49:18,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-11-07 07:49:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:49:18,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:18,360 INFO L513 BasicCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:18,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 07:49:18,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 07:49:18,574 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash -485334593, now seen corresponding path program 28 times [2021-11-07 07:49:18,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:18,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662723992] [2021-11-07 07:49:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:18,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:19,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662723992] [2021-11-07 07:49:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662723992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:19,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655917045] [2021-11-07 07:49:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:19,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:19,118 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:19,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:49:19,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:19,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:19,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:49:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655917045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:20,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 07:49:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451326602] [2021-11-07 07:49:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:49:20,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:49:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:49:20,184 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:20,594 INFO L93 Difference]: Finished difference Result 476 states and 509 transitions. [2021-11-07 07:49:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:49:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-11-07 07:49:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:20,597 INFO L225 Difference]: With dead ends: 476 [2021-11-07 07:49:20,597 INFO L226 Difference]: Without dead ends: 321 [2021-11-07 07:49:20,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:49:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-07 07:49:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 257. [2021-11-07 07:49:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.125) internal successors, (288), 256 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2021-11-07 07:49:20,626 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 104 [2021-11-07 07:49:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:20,627 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2021-11-07 07:49:20,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2021-11-07 07:49:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 07:49:20,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:20,629 INFO L513 BasicCegarLoop]: trace histogram [32, 31, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:20,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:20,842 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:20,843 INFO L85 PathProgramCache]: Analyzing trace with hash 49488453, now seen corresponding path program 29 times [2021-11-07 07:49:20,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:20,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324873944] [2021-11-07 07:49:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:20,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324873944] [2021-11-07 07:49:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324873944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250542152] [2021-11-07 07:49:21,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:21,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:21,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:21,392 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:21,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:49:24,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-11-07 07:49:24,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:49:24,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:24,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250542152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:24,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:24,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-07 07:49:24,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067051807] [2021-11-07 07:49:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:49:24,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:49:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:49:24,508 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:24,822 INFO L93 Difference]: Finished difference Result 491 states and 525 transitions. [2021-11-07 07:49:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:49:24,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 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 107 [2021-11-07 07:49:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:24,827 INFO L225 Difference]: With dead ends: 491 [2021-11-07 07:49:24,827 INFO L226 Difference]: Without dead ends: 331 [2021-11-07 07:49:24,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:49:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-07 07:49:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-11-07 07:49:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2021-11-07 07:49:24,839 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 107 [2021-11-07 07:49:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:24,839 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2021-11-07 07:49:24,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.1142857142857143) internal successors, (109), 35 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2021-11-07 07:49:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:49:24,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:24,841 INFO L513 BasicCegarLoop]: trace histogram [33, 32, 32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:24,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:25,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:25,063 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1365816321, now seen corresponding path program 30 times [2021-11-07 07:49:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:25,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891723362] [2021-11-07 07:49:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:25,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:25,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891723362] [2021-11-07 07:49:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891723362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225825440] [2021-11-07 07:49:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:25,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:25,607 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:49:45,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-07 07:49:45,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:45,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:49:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:46,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225825440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:46,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:46,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 07:49:46,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686630518] [2021-11-07 07:49:46,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:49:46,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:49:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:49:46,131 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:46,416 INFO L93 Difference]: Finished difference Result 506 states and 541 transitions. [2021-11-07 07:49:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:49:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 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 [2021-11-07 07:49:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:46,419 INFO L225 Difference]: With dead ends: 506 [2021-11-07 07:49:46,419 INFO L226 Difference]: Without dead ends: 341 [2021-11-07 07:49:46,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:49:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-07 07:49:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 273. [2021-11-07 07:49:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.125) internal successors, (306), 272 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 306 transitions. [2021-11-07 07:49:46,431 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 306 transitions. Word has length 110 [2021-11-07 07:49:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:46,431 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 306 transitions. [2021-11-07 07:49:46,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 306 transitions. [2021-11-07 07:49:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 07:49:46,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:46,433 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:46,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 07:49:46,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:46,646 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:46,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1016393723, now seen corresponding path program 31 times [2021-11-07 07:49:46,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:46,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517850669] [2021-11-07 07:49:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:46,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:47,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:47,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517850669] [2021-11-07 07:49:47,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517850669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:47,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192600679] [2021-11-07 07:49:47,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:47,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:47,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:47,238 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:47,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:49:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:49:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:48,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192600679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:48,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:48,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-07 07:49:48,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290109648] [2021-11-07 07:49:48,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:49:48,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:49:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:49:48,183 INFO L87 Difference]: Start difference. First operand 273 states and 306 transitions. Second operand has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:48,477 INFO L93 Difference]: Finished difference Result 521 states and 557 transitions. [2021-11-07 07:49:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:49:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 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 113 [2021-11-07 07:49:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:48,482 INFO L225 Difference]: With dead ends: 521 [2021-11-07 07:49:48,483 INFO L226 Difference]: Without dead ends: 351 [2021-11-07 07:49:48,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:49:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-07 07:49:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 281. [2021-11-07 07:49:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.125) internal successors, (315), 280 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2021-11-07 07:49:48,495 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 113 [2021-11-07 07:49:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2021-11-07 07:49:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.108108108108108) internal successors, (115), 37 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2021-11-07 07:49:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 07:49:48,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:48,497 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 34, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:48,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 07:49:48,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:49:48,716 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465087, now seen corresponding path program 32 times [2021-11-07 07:49:48,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:48,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231056735] [2021-11-07 07:49:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:48,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:49,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231056735] [2021-11-07 07:49:49,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231056735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:49,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092485432] [2021-11-07 07:49:49,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:49,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:49,419 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:49,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:49:50,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:49:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1754 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092485432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:50,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:50,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 07:49:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139722667] [2021-11-07 07:49:50,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:49:50,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:49:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:49:50,519 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:50,830 INFO L93 Difference]: Finished difference Result 536 states and 573 transitions. [2021-11-07 07:49:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:49:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 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 116 [2021-11-07 07:49:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:50,832 INFO L225 Difference]: With dead ends: 536 [2021-11-07 07:49:50,832 INFO L226 Difference]: Without dead ends: 361 [2021-11-07 07:49:50,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:49:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-07 07:49:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 289. [2021-11-07 07:49:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.125) internal successors, (324), 288 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2021-11-07 07:49:50,843 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 116 [2021-11-07 07:49:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:50,844 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2021-11-07 07:49:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2021-11-07 07:49:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 07:49:50,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:50,846 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:50,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 07:49:51,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:49:51,058 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -534139451, now seen corresponding path program 33 times [2021-11-07 07:49:51,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:51,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383956783] [2021-11-07 07:49:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:51,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:49:51,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:51,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383956783] [2021-11-07 07:49:51,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383956783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:51,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624892942] [2021-11-07 07:49:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:51,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:51,653 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:50:10,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-11-07 07:50:10,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:50:10,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1858 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624892942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:10,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:10,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 07:50:10,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532535933] [2021-11-07 07:50:10,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:50:10,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:50:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:50:10,970 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:11,293 INFO L93 Difference]: Finished difference Result 551 states and 589 transitions. [2021-11-07 07:50:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:50:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 07:50:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:11,296 INFO L225 Difference]: With dead ends: 551 [2021-11-07 07:50:11,296 INFO L226 Difference]: Without dead ends: 371 [2021-11-07 07:50:11,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:50:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-07 07:50:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 297. [2021-11-07 07:50:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.125) internal successors, (333), 296 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 333 transitions. [2021-11-07 07:50:11,308 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 333 transitions. Word has length 119 [2021-11-07 07:50:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 333 transitions. [2021-11-07 07:50:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 333 transitions. [2021-11-07 07:50:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 07:50:11,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:11,310 INFO L513 BasicCegarLoop]: trace histogram [37, 36, 36, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:11,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:11,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:50:11,539 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2097877119, now seen corresponding path program 34 times [2021-11-07 07:50:11,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:11,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309971757] [2021-11-07 07:50:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:11,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:12,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:12,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309971757] [2021-11-07 07:50:12,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309971757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:12,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068023948] [2021-11-07 07:50:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:12,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:12,193 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:12,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:50:12,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:50:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1965 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:13,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068023948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:13,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:13,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 07:50:13,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287558969] [2021-11-07 07:50:13,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:50:13,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:50:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:50:13,343 INFO L87 Difference]: Start difference. First operand 297 states and 333 transitions. Second operand has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:13,683 INFO L93 Difference]: Finished difference Result 566 states and 605 transitions. [2021-11-07 07:50:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:50:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 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 122 [2021-11-07 07:50:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:13,685 INFO L225 Difference]: With dead ends: 566 [2021-11-07 07:50:13,685 INFO L226 Difference]: Without dead ends: 381 [2021-11-07 07:50:13,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:50:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-07 07:50:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 305. [2021-11-07 07:50:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.125) internal successors, (342), 304 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 342 transitions. [2021-11-07 07:50:13,697 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 342 transitions. Word has length 122 [2021-11-07 07:50:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 342 transitions. [2021-11-07 07:50:13,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 342 transitions. [2021-11-07 07:50:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 07:50:13,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:13,699 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:13,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:13,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:13,927 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash -714409083, now seen corresponding path program 35 times [2021-11-07 07:50:13,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:13,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146071746] [2021-11-07 07:50:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:13,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:14,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:14,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146071746] [2021-11-07 07:50:14,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146071746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:14,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853533433] [2021-11-07 07:50:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:14,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:14,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:14,612 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:14,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:50:25,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-11-07 07:50:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:50:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2075 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853533433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:25,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:25,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-07 07:50:25,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947407887] [2021-11-07 07:50:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:50:25,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:50:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:50:25,838 INFO L87 Difference]: Start difference. First operand 305 states and 342 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:26,351 INFO L93 Difference]: Finished difference Result 581 states and 621 transitions. [2021-11-07 07:50:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:50:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-11-07 07:50:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:26,354 INFO L225 Difference]: With dead ends: 581 [2021-11-07 07:50:26,354 INFO L226 Difference]: Without dead ends: 391 [2021-11-07 07:50:26,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:50:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-07 07:50:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 313. [2021-11-07 07:50:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.125) internal successors, (351), 312 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 351 transitions. [2021-11-07 07:50:26,366 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 351 transitions. Word has length 125 [2021-11-07 07:50:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:26,367 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 351 transitions. [2021-11-07 07:50:26,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 351 transitions. [2021-11-07 07:50:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:50:26,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:26,368 INFO L513 BasicCegarLoop]: trace histogram [39, 38, 38, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:26,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:26,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:50:26,583 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash 394390207, now seen corresponding path program 36 times [2021-11-07 07:50:26,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:26,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490865657] [2021-11-07 07:50:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:26,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:50:27,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:27,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490865657] [2021-11-07 07:50:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490865657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:27,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581741002] [2021-11-07 07:50:27,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:27,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:27,451 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:27,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:51:26,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-07 07:51:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:51:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:27,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581741002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:27,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:27,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 07:51:27,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828443229] [2021-11-07 07:51:27,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:51:27,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:51:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:51:27,426 INFO L87 Difference]: Start difference. First operand 313 states and 351 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:27,851 INFO L93 Difference]: Finished difference Result 596 states and 637 transitions. [2021-11-07 07:51:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:51:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 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 128 [2021-11-07 07:51:27,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:27,854 INFO L225 Difference]: With dead ends: 596 [2021-11-07 07:51:27,855 INFO L226 Difference]: Without dead ends: 401 [2021-11-07 07:51:27,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:51:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-07 07:51:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 321. [2021-11-07 07:51:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.125) internal successors, (360), 320 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 360 transitions. [2021-11-07 07:51:27,870 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 360 transitions. Word has length 128 [2021-11-07 07:51:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 360 transitions. [2021-11-07 07:51:27,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 360 transitions. [2021-11-07 07:51:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 07:51:27,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:27,872 INFO L513 BasicCegarLoop]: trace histogram [40, 39, 39, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:27,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:28,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:28,099 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 40565061, now seen corresponding path program 37 times [2021-11-07 07:51:28,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:28,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482491266] [2021-11-07 07:51:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:28,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:28,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:28,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482491266] [2021-11-07 07:51:28,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482491266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:28,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715048589] [2021-11-07 07:51:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:28,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:28,934 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:28,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:51:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:51:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:30,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715048589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:30,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:30,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-07 07:51:30,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448240779] [2021-11-07 07:51:30,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:51:30,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:51:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:51:30,275 INFO L87 Difference]: Start difference. First operand 321 states and 360 transitions. Second operand has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:30,709 INFO L93 Difference]: Finished difference Result 611 states and 653 transitions. [2021-11-07 07:51:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:51:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2021-11-07 07:51:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:30,711 INFO L225 Difference]: With dead ends: 611 [2021-11-07 07:51:30,712 INFO L226 Difference]: Without dead ends: 411 [2021-11-07 07:51:30,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:51:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-07 07:51:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 329. [2021-11-07 07:51:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.125) internal successors, (369), 328 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 369 transitions. [2021-11-07 07:51:30,725 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 369 transitions. Word has length 131 [2021-11-07 07:51:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 369 transitions. [2021-11-07 07:51:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 369 transitions. [2021-11-07 07:51:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:51:30,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:30,728 INFO L513 BasicCegarLoop]: trace histogram [41, 40, 40, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:30,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:30,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 07:51:30,955 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -914615041, now seen corresponding path program 38 times [2021-11-07 07:51:30,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:30,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488215286] [2021-11-07 07:51:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:30,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2423 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:31,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488215286] [2021-11-07 07:51:31,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488215286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201217975] [2021-11-07 07:51:31,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:31,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:31,973 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:32,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:51:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:32,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:51:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2423 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:33,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201217975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:33,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:33,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-07 07:51:33,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106306173] [2021-11-07 07:51:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:51:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:51:33,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:51:33,444 INFO L87 Difference]: Start difference. First operand 329 states and 369 transitions. Second operand has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:33,940 INFO L93 Difference]: Finished difference Result 626 states and 669 transitions. [2021-11-07 07:51:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:51:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 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 134 [2021-11-07 07:51:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:33,943 INFO L225 Difference]: With dead ends: 626 [2021-11-07 07:51:33,943 INFO L226 Difference]: Without dead ends: 421 [2021-11-07 07:51:33,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:51:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-07 07:51:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 337. [2021-11-07 07:51:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.125) internal successors, (378), 336 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 378 transitions. [2021-11-07 07:51:33,958 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 378 transitions. Word has length 134 [2021-11-07 07:51:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:33,959 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 378 transitions. [2021-11-07 07:51:33,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.090909090909091) internal successors, (136), 44 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 378 transitions. [2021-11-07 07:51:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 07:51:33,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:33,961 INFO L513 BasicCegarLoop]: trace histogram [42, 41, 41, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:33,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:34,187 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1768269573, now seen corresponding path program 39 times [2021-11-07 07:51:34,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:34,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257210416] [2021-11-07 07:51:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:34,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:51:35,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257210416] [2021-11-07 07:51:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257210416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:35,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860986335] [2021-11-07 07:51:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:35,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:35,220 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:35,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:52:08,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-07 07:52:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:52:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:09,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860986335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:09,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:09,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 07:52:09,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972255938] [2021-11-07 07:52:09,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:52:09,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:52:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:52:09,116 INFO L87 Difference]: Start difference. First operand 337 states and 378 transitions. Second operand has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:09,572 INFO L93 Difference]: Finished difference Result 641 states and 685 transitions. [2021-11-07 07:52:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:52:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 07:52:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:09,574 INFO L225 Difference]: With dead ends: 641 [2021-11-07 07:52:09,574 INFO L226 Difference]: Without dead ends: 431 [2021-11-07 07:52:09,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:52:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-07 07:52:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 345. [2021-11-07 07:52:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.125) internal successors, (387), 344 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2021-11-07 07:52:09,586 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 137 [2021-11-07 07:52:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:09,587 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2021-11-07 07:52:09,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.088888888888889) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2021-11-07 07:52:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:52:09,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:09,589 INFO L513 BasicCegarLoop]: trace histogram [43, 42, 42, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:09,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:09,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:09,791 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1757573313, now seen corresponding path program 40 times [2021-11-07 07:52:09,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:09,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790983726] [2021-11-07 07:52:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:09,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:10,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:10,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790983726] [2021-11-07 07:52:10,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790983726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:10,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158869617] [2021-11-07 07:52:10,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:10,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:10,676 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:10,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:52:11,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:52:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:12,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158869617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:12,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:12,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-07 07:52:12,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695074383] [2021-11-07 07:52:12,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:52:12,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:12,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:52:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:52:12,141 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:12,630 INFO L93 Difference]: Finished difference Result 656 states and 701 transitions. [2021-11-07 07:52:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:52:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-11-07 07:52:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:12,633 INFO L225 Difference]: With dead ends: 656 [2021-11-07 07:52:12,633 INFO L226 Difference]: Without dead ends: 441 [2021-11-07 07:52:12,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:52:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-07 07:52:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 353. [2021-11-07 07:52:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.125) internal successors, (396), 352 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 396 transitions. [2021-11-07 07:52:12,646 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 396 transitions. Word has length 140 [2021-11-07 07:52:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 396 transitions. [2021-11-07 07:52:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0869565217391304) internal successors, (142), 46 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 396 transitions. [2021-11-07 07:52:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 07:52:12,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:12,648 INFO L513 BasicCegarLoop]: trace histogram [44, 43, 43, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:12,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:12,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:52:12,867 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1872168133, now seen corresponding path program 41 times [2021-11-07 07:52:12,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:12,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907892711] [2021-11-07 07:52:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:12,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:13,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:13,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907892711] [2021-11-07 07:52:13,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907892711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:13,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867610386] [2021-11-07 07:52:13,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:52:13,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:13,793 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:13,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:52:36,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2021-11-07 07:52:36,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:52:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:37,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867610386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:37,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:37,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-07 07:52:37,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513457848] [2021-11-07 07:52:37,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:52:37,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:37,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:52:37,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:52:37,381 INFO L87 Difference]: Start difference. First operand 353 states and 396 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:37,913 INFO L93 Difference]: Finished difference Result 671 states and 717 transitions. [2021-11-07 07:52:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:52:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 07:52:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:37,916 INFO L225 Difference]: With dead ends: 671 [2021-11-07 07:52:37,916 INFO L226 Difference]: Without dead ends: 451 [2021-11-07 07:52:37,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:52:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-07 07:52:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 361. [2021-11-07 07:52:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.125) internal successors, (405), 360 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 405 transitions. [2021-11-07 07:52:37,935 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 405 transitions. Word has length 143 [2021-11-07 07:52:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:37,935 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 405 transitions. [2021-11-07 07:52:37,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 405 transitions. [2021-11-07 07:52:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 07:52:37,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:37,937 INFO L513 BasicCegarLoop]: trace histogram [45, 44, 44, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:37,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-07 07:52:38,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 07:52:38,151 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:38,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1107974527, now seen corresponding path program 42 times [2021-11-07 07:52:38,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:38,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114696418] [2021-11-07 07:52:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:52:39,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114696418] [2021-11-07 07:52:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114696418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:39,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196717647] [2021-11-07 07:52:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:52:39,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:39,233 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:55:06,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-11-07 07:55:06,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:55:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:06,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196717647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:06,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:06,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 07:55:06,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819242825] [2021-11-07 07:55:06,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:55:06,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:55:06,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:55:06,765 INFO L87 Difference]: Start difference. First operand 361 states and 405 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:07,427 INFO L93 Difference]: Finished difference Result 686 states and 733 transitions. [2021-11-07 07:55:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:55:07,428 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 146 [2021-11-07 07:55:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:07,432 INFO L225 Difference]: With dead ends: 686 [2021-11-07 07:55:07,432 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 07:55:07,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:55:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 07:55:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 369. [2021-11-07 07:55:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.125) internal successors, (414), 368 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 414 transitions. [2021-11-07 07:55:07,448 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 414 transitions. Word has length 146 [2021-11-07 07:55:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:07,448 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 414 transitions. [2021-11-07 07:55:07,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 414 transitions. [2021-11-07 07:55:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:55:07,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:07,451 INFO L513 BasicCegarLoop]: trace histogram [46, 45, 45, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:07,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:55:07,662 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1657073019, now seen corresponding path program 43 times [2021-11-07 07:55:07,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:07,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606304578] [2021-11-07 07:55:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:07,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:08,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:08,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606304578] [2021-11-07 07:55:08,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606304578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:08,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810557194] [2021-11-07 07:55:08,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:08,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:08,726 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:08,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:55:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:09,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 07:55:09,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3063 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:10,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810557194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:10,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:10,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-07 07:55:10,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713841470] [2021-11-07 07:55:10,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:55:10,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:10,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:55:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:55:10,399 INFO L87 Difference]: Start difference. First operand 369 states and 414 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:11,023 INFO L93 Difference]: Finished difference Result 701 states and 749 transitions. [2021-11-07 07:55:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:55:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 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 149 [2021-11-07 07:55:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:11,026 INFO L225 Difference]: With dead ends: 701 [2021-11-07 07:55:11,026 INFO L226 Difference]: Without dead ends: 471 [2021-11-07 07:55:11,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:55:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-07 07:55:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 377. [2021-11-07 07:55:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.125) internal successors, (423), 376 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 423 transitions. [2021-11-07 07:55:11,044 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 423 transitions. Word has length 149 [2021-11-07 07:55:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:11,044 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 423 transitions. [2021-11-07 07:55:11,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 423 transitions. [2021-11-07 07:55:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 07:55:11,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:11,046 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:11,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 07:55:11,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:11,263 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:11,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2010745921, now seen corresponding path program 44 times [2021-11-07 07:55:11,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:11,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673760390] [2021-11-07 07:55:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:11,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:12,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:12,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673760390] [2021-11-07 07:55:12,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673760390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:12,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099557139] [2021-11-07 07:55:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:12,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:12,311 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:12,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:55:13,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:13,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:55:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:14,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099557139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:14,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:14,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-07 07:55:14,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291416818] [2021-11-07 07:55:14,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:55:14,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:55:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:55:14,051 INFO L87 Difference]: Start difference. First operand 377 states and 423 transitions. Second operand has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:14,668 INFO L93 Difference]: Finished difference Result 716 states and 765 transitions. [2021-11-07 07:55:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:55:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 07:55:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:14,671 INFO L225 Difference]: With dead ends: 716 [2021-11-07 07:55:14,672 INFO L226 Difference]: Without dead ends: 481 [2021-11-07 07:55:14,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:55:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-07 07:55:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 385. [2021-11-07 07:55:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.125) internal successors, (432), 384 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 432 transitions. [2021-11-07 07:55:14,684 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 432 transitions. Word has length 152 [2021-11-07 07:55:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:14,685 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 432 transitions. [2021-11-07 07:55:14,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.08) internal successors, (154), 50 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 432 transitions. [2021-11-07 07:55:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 07:55:14,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:14,686 INFO L513 BasicCegarLoop]: trace histogram [48, 47, 47, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:14,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:14,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:55:14,915 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1569574981, now seen corresponding path program 45 times [2021-11-07 07:55:14,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:14,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273188554] [2021-11-07 07:55:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:14,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:16,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:16,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273188554] [2021-11-07 07:55:16,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273188554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:16,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721854567] [2021-11-07 07:55:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:16,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:16,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:16,195 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:16,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:57:39,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-11-07 07:57:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:57:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:57:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721854567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:39,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-07 07:57:39,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543530672] [2021-11-07 07:57:39,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:57:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:57:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:57:39,973 INFO L87 Difference]: Start difference. First operand 385 states and 432 transitions. Second operand has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:40,568 INFO L93 Difference]: Finished difference Result 731 states and 781 transitions. [2021-11-07 07:57:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:57:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 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 155 [2021-11-07 07:57:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:40,571 INFO L225 Difference]: With dead ends: 731 [2021-11-07 07:57:40,571 INFO L226 Difference]: Without dead ends: 491 [2021-11-07 07:57:40,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:57:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-07 07:57:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 393. [2021-11-07 07:57:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.125) internal successors, (441), 392 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 441 transitions. [2021-11-07 07:57:40,582 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 441 transitions. Word has length 155 [2021-11-07 07:57:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:40,582 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 441 transitions. [2021-11-07 07:57:40,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0784313725490198) internal successors, (157), 51 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 441 transitions. [2021-11-07 07:57:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:57:40,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:40,585 INFO L513 BasicCegarLoop]: trace histogram [49, 48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:40,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 07:57:40,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:57:40,786 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:40,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:40,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1691737599, now seen corresponding path program 46 times [2021-11-07 07:57:40,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:40,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760011196] [2021-11-07 07:57:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:40,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:57:42,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760011196] [2021-11-07 07:57:42,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760011196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:42,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044098172] [2021-11-07 07:57:42,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:42,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:42,102 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:42,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:57:43,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:43,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:57:43,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:57:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044098172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:44,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:44,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-07 07:57:44,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367886228] [2021-11-07 07:57:44,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 07:57:44,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 07:57:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:57:44,144 INFO L87 Difference]: Start difference. First operand 393 states and 441 transitions. Second operand has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:44,856 INFO L93 Difference]: Finished difference Result 746 states and 797 transitions. [2021-11-07 07:57:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:57:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 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 158 [2021-11-07 07:57:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:44,859 INFO L225 Difference]: With dead ends: 746 [2021-11-07 07:57:44,859 INFO L226 Difference]: Without dead ends: 501 [2021-11-07 07:57:44,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:57:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-07 07:57:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-11-07 07:57:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.125) internal successors, (450), 400 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 450 transitions. [2021-11-07 07:57:44,877 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 450 transitions. Word has length 158 [2021-11-07 07:57:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:44,878 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 450 transitions. [2021-11-07 07:57:44,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 450 transitions. [2021-11-07 07:57:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 07:57:44,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:44,880 INFO L513 BasicCegarLoop]: trace histogram [50, 49, 49, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:44,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:45,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:45,107 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1093976571, now seen corresponding path program 47 times [2021-11-07 07:57:45,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:45,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139196220] [2021-11-07 07:57:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:45,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:57:46,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:46,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139196220] [2021-11-07 07:57:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139196220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:46,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224546599] [2021-11-07 07:57:46,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:46,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:46,527 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:46,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:58:25,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-11-07 07:58:25,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:58:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:58:26,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224546599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:26,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:26,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-07 07:58:26,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831659688] [2021-11-07 07:58:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:58:26,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:58:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:58:26,581 INFO L87 Difference]: Start difference. First operand 401 states and 450 transitions. Second operand has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:27,271 INFO L93 Difference]: Finished difference Result 761 states and 813 transitions. [2021-11-07 07:58:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:58:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 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 161 [2021-11-07 07:58:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:27,274 INFO L225 Difference]: With dead ends: 761 [2021-11-07 07:58:27,274 INFO L226 Difference]: Without dead ends: 511 [2021-11-07 07:58:27,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:58:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-07 07:58:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 409. [2021-11-07 07:58:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.125) internal successors, (459), 408 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 459 transitions. [2021-11-07 07:58:27,286 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 459 transitions. Word has length 161 [2021-11-07 07:58:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 459 transitions. [2021-11-07 07:58:27,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 53 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 459 transitions. [2021-11-07 07:58:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:58:27,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:27,288 INFO L513 BasicCegarLoop]: trace histogram [51, 50, 50, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:27,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:27,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-07 07:58:27,489 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:27,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1348245567, now seen corresponding path program 48 times [2021-11-07 07:58:27,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:27,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675792363] [2021-11-07 07:58:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:27,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:58:28,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675792363] [2021-11-07 07:58:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675792363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564202860] [2021-11-07 07:58:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:28,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:28,896 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:28,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d256bf3c-5daa-4267-b5b0-2ab7cd45eb90/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process