./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c --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_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/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_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/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_33e22633-211b-4a22-a677-9f8d96b4c24e/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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:54:48,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:54:48,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:54:48,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:54:48,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:54:48,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:54:48,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:54:48,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:54:48,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:54:48,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:54:48,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:54:48,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:54:48,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:54:48,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:54:48,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:54:48,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:54:48,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:54:48,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:54:48,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:54:48,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:54:48,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:54:48,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:54:48,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:54:48,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:54:48,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:54:48,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:54:48,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:54:48,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:54:48,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:54:48,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:54:48,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:54:48,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:54:48,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:54:48,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:54:48,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:54:48,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:54:48,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:54:48,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:54:48,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:54:48,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:54:48,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:54:48,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:54:48,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:54:48,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:54:48,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:54:48,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:54:48,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:54:48,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:54:48,637 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:54:48,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:54:48,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:54:48,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:54:48,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:54:48,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:54:48,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:54:48,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:54:48,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:54:48,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:54:48,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:54:48,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:54:48,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:54:48,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:54:48,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:54:48,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:54:48,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:54:48,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:54:48,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:54:48,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:54:48,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:54:48,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:54:48,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:54:48,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:54:48,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:54:48,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:54:48,646 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_33e22633-211b-4a22-a677-9f8d96b4c24e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2021-11-07 07:54:48,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:54:48,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:54:48,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:54:48,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:54:48,975 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:54:48,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-07 07:54:49,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/data/f97fe3cee/afccac75be7a4c2e944965520a1c28a9/FLAG4c8c9ffc0 [2021-11-07 07:54:49,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:54:49,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2021-11-07 07:54:49,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/data/f97fe3cee/afccac75be7a4c2e944965520a1c28a9/FLAG4c8c9ffc0 [2021-11-07 07:54:49,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/data/f97fe3cee/afccac75be7a4c2e944965520a1c28a9 [2021-11-07 07:54:49,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:54:49,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:54:49,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:54:49,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:54:49,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:54:49,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:54:49" (1/1) ... [2021-11-07 07:54:49,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2991ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:49, skipping insertion in model container [2021-11-07 07:54:49,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:54:49" (1/1) ... [2021-11-07 07:54:49,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:54:50,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:54:50,168 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_33e22633-211b-4a22-a677-9f8d96b4c24e/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-07 07:54:50,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:54:50,205 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:54:50,219 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_33e22633-211b-4a22-a677-9f8d96b4c24e/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2021-11-07 07:54:50,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:54:50,242 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:54:50,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50 WrapperNode [2021-11-07 07:54:50,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:54:50,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:54:50,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:54:50,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:54:50,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:54:50,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:54:50,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:54:50,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:54:50,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:54:50,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:54:50,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:54:50,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:54:50,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (1/1) ... [2021-11-07 07:54:50,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:54:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:50,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:54:50,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:54:50,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:54:50,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:54:50,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:54:50,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:54:50,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:54:50,644 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 07:54:50,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:54:50 BoogieIcfgContainer [2021-11-07 07:54:50,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:54:50,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:54:50,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:54:50,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:54:50,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:54:49" (1/3) ... [2021-11-07 07:54:50,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39602e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:54:50, skipping insertion in model container [2021-11-07 07:54:50,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:54:50" (2/3) ... [2021-11-07 07:54:50,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39602e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:54:50, skipping insertion in model container [2021-11-07 07:54:50,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:54:50" (3/3) ... [2021-11-07 07:54:50,654 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2021-11-07 07:54:50,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:54:50,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:54:50,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:54:50,715 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 07:54:50,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:54:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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 07:54:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:54:50,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:50,735 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:54:50,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:50,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-11-07 07:54:50,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:50,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620912264] [2021-11-07 07:54:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:50,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:50,894 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 07:54:50,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:50,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620912264] [2021-11-07 07:54:50,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620912264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:50,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:50,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:54:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829404053] [2021-11-07 07:54:50,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:54:50,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:54:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:54:50,919 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 07:54:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:50,932 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-07 07:54:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:54:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 07:54:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:50,942 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:54:50,942 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 07:54:50,945 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 07:54:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 07:54:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 07:54:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-07 07:54:50,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-07 07:54:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:50,979 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-07 07:54:50,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 07:54:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-07 07:54:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:54:50,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:50,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:54:50,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:54:50,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-11-07 07:54:50,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:50,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657264378] [2021-11-07 07:54:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:50,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,106 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 07:54:51,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:51,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657264378] [2021-11-07 07:54:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657264378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:51,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:51,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:54:51,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356135089] [2021-11-07 07:54:51,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:54:51,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:54:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:54:51,111 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 07:54:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:51,143 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-11-07 07:54:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:54:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 07:54:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:51,145 INFO L225 Difference]: With dead ends: 16 [2021-11-07 07:54:51,145 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 07:54:51,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:54:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 07:54:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 07:54:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-07 07:54:51,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-07 07:54:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:51,150 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-07 07:54:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 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 07:54:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-07 07:54:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:54:51,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:51,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:51,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:54:51,167 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-11-07 07:54:51,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:51,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740973698] [2021-11-07 07:54:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:51,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,247 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 07:54:51,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740973698] [2021-11-07 07:54:51,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740973698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040072821] [2021-11-07 07:54:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:51,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:51,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:51,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:54:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:54:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:51,410 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 07:54:51,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040072821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:51,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:51,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:54:51,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961309753] [2021-11-07 07:54:51,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:54:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:54:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:54:51,418 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:51,459 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-11-07 07:54:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:54:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:54:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:51,460 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:54:51,461 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 07:54:51,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 07:54:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 07:54:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-07 07:54:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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 07:54:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-07 07:54:51,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-07 07:54:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:51,469 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-07 07:54:51,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-07 07:54:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:54:51,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:51,470 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:51,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:51,695 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-11-07 07:54:51,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:51,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386762790] [2021-11-07 07:54:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:51,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:54:51,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:51,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386762790] [2021-11-07 07:54:51,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386762790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:51,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:54:51,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:54:51,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982027933] [2021-11-07 07:54:51,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:54:51,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:54:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:54:51,755 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:51,769 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-07 07:54:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:54:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 07:54:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:51,771 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:54:51,771 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:54:51,771 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 07:54:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:54:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 07:54:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 07:54:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-07 07:54:51,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-11-07 07:54:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:51,778 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-07 07:54:51,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-07 07:54:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:54:51,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:51,779 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:51,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:54:51,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:51,781 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-11-07 07:54:51,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:51,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844983611] [2021-11-07 07:54:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:51,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:54:51,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:51,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844983611] [2021-11-07 07:54:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844983611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:51,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032619271] [2021-11-07 07:54:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:51,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:51,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:51,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:54:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:54:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:51,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032619271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:51,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:51,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 07:54:51,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241694937] [2021-11-07 07:54:51,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:54:51,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:51,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:54:51,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:54:51,988 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:54:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:52,065 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-11-07 07:54:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:54:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 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 12 [2021-11-07 07:54:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:52,067 INFO L225 Difference]: With dead ends: 29 [2021-11-07 07:54:52,067 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:54:52,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:54:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:54:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-07 07:54:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:54:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-07 07:54:52,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-07 07:54:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:52,073 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-07 07:54:52,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:54:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-07 07:54:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:54:52,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:52,074 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:52,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:52,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:52,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1327998684, now seen corresponding path program 2 times [2021-11-07 07:54:52,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:52,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626679591] [2021-11-07 07:54:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:52,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:54:52,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:52,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626679591] [2021-11-07 07:54:52,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626679591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:52,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127064885] [2021-11-07 07:54:52,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:54:52,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:52,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:52,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:54:52,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:54:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:54:52,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127064885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:52,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:52,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 07:54:52,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95975992] [2021-11-07 07:54:52,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:54:52,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:54:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:54:52,525 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:54:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:52,551 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-07 07:54:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:54:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 16 [2021-11-07 07:54:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:52,553 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:54:52,553 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 07:54:52,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 07:54:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 07:54:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-07 07:54:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 07:54:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-07 07:54:52,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-07 07:54:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:52,559 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-07 07:54:52,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 07:54:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-07 07:54:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:54:52,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:52,561 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:52,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:52,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:54:52,780 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1229316985, now seen corresponding path program 3 times [2021-11-07 07:54:52,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:52,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355060500] [2021-11-07 07:54:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:52,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:54:52,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:52,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355060500] [2021-11-07 07:54:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355060500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:52,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413438853] [2021-11-07 07:54:52,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:54:52,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:52,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:52,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:52,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:54:52,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:54:52,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:54:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 07:54:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413438853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:53,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:53,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-07 07:54:53,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117879627] [2021-11-07 07:54:53,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:54:53,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:54:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:54:53,191 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 07:54:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:53,293 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-07 07:54:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:54:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 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 18 [2021-11-07 07:54:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:53,295 INFO L225 Difference]: With dead ends: 35 [2021-11-07 07:54:53,295 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:54:53,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:54:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:54:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-07 07:54:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 07:54:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-07 07:54:53,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-11-07 07:54:53,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:53,302 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-07 07:54:53,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 07:54:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-07 07:54:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:54:53,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:53,303 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:53,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:53,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 07:54:53,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash -495138033, now seen corresponding path program 4 times [2021-11-07 07:54:53,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:53,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385760002] [2021-11-07 07:54:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:53,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:53,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385760002] [2021-11-07 07:54:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385760002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820593496] [2021-11-07 07:54:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:54:53,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:53,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:53,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:54:53,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:54:53,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:54:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:53,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820593496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:53,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:53,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:54:53,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295126801] [2021-11-07 07:54:53,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:54:53,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:54:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:54:53,756 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 07:54:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:53,786 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-11-07 07:54:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:54:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) Word has length 22 [2021-11-07 07:54:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:53,787 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:54:53,787 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:54:53,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 07:54:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:54:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-07 07:54:53,791 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 07:54:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-07 07:54:53,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2021-11-07 07:54:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:53,793 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-07 07:54:53,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 07:54:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-07 07:54:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:54:53,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:53,794 INFO L513 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:53,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 07:54:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:54,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 264845362, now seen corresponding path program 5 times [2021-11-07 07:54:54,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:54,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717348373] [2021-11-07 07:54:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:54,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:54,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:54,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717348373] [2021-11-07 07:54:54,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717348373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:54,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703918088] [2021-11-07 07:54:54,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:54:54,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:54,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:54,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:54:54,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 07:54:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:54:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:54,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703918088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:54,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:54,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:54:54,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736227092] [2021-11-07 07:54:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:54:54,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:54:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:54:54,310 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 07:54:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:54,369 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-11-07 07:54:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:54:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 24 [2021-11-07 07:54:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:54,371 INFO L225 Difference]: With dead ends: 36 [2021-11-07 07:54:54,371 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 07:54:54,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 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 07:54:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 07:54:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 07:54:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 07:54:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-07 07:54:54,388 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2021-11-07 07:54:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:54,388 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-07 07:54:54,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 07:54:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-07 07:54:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:54:54,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:54,390 INFO L513 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:54,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:54,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 464447637, now seen corresponding path program 6 times [2021-11-07 07:54:54,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:54,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041066365] [2021-11-07 07:54:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:54,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:54,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:54,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041066365] [2021-11-07 07:54:54,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041066365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:54,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489602587] [2021-11-07 07:54:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:54:54,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:54,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:54,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:54:54,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-07 07:54:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:54:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:54,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489602587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:54,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:54,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:54:54,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916959184] [2021-11-07 07:54:54,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:54:54,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:54:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:54:54,977 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 07:54:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:55,023 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-11-07 07:54:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:54:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:54:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:55,025 INFO L225 Difference]: With dead ends: 38 [2021-11-07 07:54:55,025 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 07:54:55,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 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 07:54:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 07:54:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 07:54:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 07:54:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-07 07:54:55,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2021-11-07 07:54:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:55,032 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-07 07:54:55,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 07:54:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-07 07:54:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:54:55,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:55,034 INFO L513 BasicCegarLoop]: trace histogram [11, 8, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:55,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:55,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:54:55,252 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -991294408, now seen corresponding path program 7 times [2021-11-07 07:54:55,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:55,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214411900] [2021-11-07 07:54:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:55,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:55,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:55,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214411900] [2021-11-07 07:54:55,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214411900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:55,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038978173] [2021-11-07 07:54:55,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:54:55,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:55,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:55,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:55,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:54:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:55,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:54:55,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:55,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038978173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:55,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:55,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:54:55,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296637320] [2021-11-07 07:54:55,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:54:55,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:54:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:54:55,553 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 07:54:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:55,593 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-07 07:54:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:54:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 28 [2021-11-07 07:54:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:55,595 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:54:55,595 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:54:55,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 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 07:54:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:54:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-07 07:54:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 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 07:54:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-07 07:54:55,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 28 [2021-11-07 07:54:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:55,601 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-07 07:54:55,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 07:54:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-07 07:54:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:54:55,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:55,603 INFO L513 BasicCegarLoop]: trace histogram [12, 9, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:55,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 07:54:55,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:54:55,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 199938843, now seen corresponding path program 8 times [2021-11-07 07:54:55,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:55,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800985619] [2021-11-07 07:54:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:55,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:55,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800985619] [2021-11-07 07:54:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800985619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83037448] [2021-11-07 07:54:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:54:55,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:55,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:54:56,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:54:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:56,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83037448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:56,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:56,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 07:54:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602073478] [2021-11-07 07:54:56,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:54:56,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:54:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:54:56,180 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 07:54:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:56,228 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-07 07:54:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:54:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 30 [2021-11-07 07:54:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:56,230 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:54:56,230 INFO L226 Difference]: Without dead ends: 33 [2021-11-07 07:54:56,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 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 07:54:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-07 07:54:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-07 07:54:56,236 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 07:54:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-11-07 07:54:56,237 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2021-11-07 07:54:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:56,237 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-11-07 07:54:56,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 07:54:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-11-07 07:54:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:54:56,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:56,239 INFO L513 BasicCegarLoop]: trace histogram [13, 10, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:56,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:54:56,455 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1781174978, now seen corresponding path program 9 times [2021-11-07 07:54:56,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945837059] [2021-11-07 07:54:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:54:56,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:56,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945837059] [2021-11-07 07:54:56,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945837059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:56,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186087461] [2021-11-07 07:54:56,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:54:56,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:56,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:56,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:54:56,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:54:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:54:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-07 07:54:56,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186087461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:56,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:56,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-11-07 07:54:56,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438471523] [2021-11-07 07:54:56,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:54:56,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:54:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:54:56,974 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:54:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:57,200 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-07 07:54:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:54:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 07:54:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:57,201 INFO L225 Difference]: With dead ends: 51 [2021-11-07 07:54:57,201 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:54:57,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:54:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:54:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-07 07:54:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:54:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-11-07 07:54:57,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 32 [2021-11-07 07:54:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:57,208 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-11-07 07:54:57,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:54:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-11-07 07:54:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:54:57,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:57,214 INFO L513 BasicCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:57,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:57,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:54:57,419 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2051424454, now seen corresponding path program 10 times [2021-11-07 07:54:57,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:57,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477267875] [2021-11-07 07:54:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:57,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:54:57,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:57,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477267875] [2021-11-07 07:54:57,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477267875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:57,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658556317] [2021-11-07 07:54:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:54:57,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:57,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:57,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:54:57,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:54:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:54:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:54:57,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658556317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:57,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:57,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:54:57,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345231242] [2021-11-07 07:54:57,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:54:57,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:54:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:54:57,830 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:57,885 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-07 07:54:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:54:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 07:54:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:57,890 INFO L225 Difference]: With dead ends: 50 [2021-11-07 07:54:57,890 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 07:54:57,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 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 07:54:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 07:54:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-07 07:54:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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 07:54:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-07 07:54:57,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 36 [2021-11-07 07:54:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:57,900 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-07 07:54:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-07 07:54:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:54:57,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:57,902 INFO L513 BasicCegarLoop]: trace histogram [16, 12, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:57,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:58,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:54:58,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash 667907241, now seen corresponding path program 11 times [2021-11-07 07:54:58,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:58,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897777962] [2021-11-07 07:54:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:58,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:54:58,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:58,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897777962] [2021-11-07 07:54:58,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897777962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:58,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523067339] [2021-11-07 07:54:58,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:54:58,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:58,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:58,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:54:58,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-07 07:54:58,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:54:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:54:58,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523067339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:58,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:58,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:54:58,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894886575] [2021-11-07 07:54:58,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:54:58,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:58,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:54:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:54:58,570 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 07:54:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:58,626 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-11-07 07:54:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:54:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 38 [2021-11-07 07:54:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:58,627 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:54:58,628 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 07:54:58,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:54:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 07:54:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-07 07:54:58,637 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 07:54:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-07 07:54:58,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2021-11-07 07:54:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:58,641 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-07 07:54:58,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 07:54:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-07 07:54:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:54:58,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:58,643 INFO L513 BasicCegarLoop]: trace histogram [17, 13, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:58,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:54:58,867 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1747239988, now seen corresponding path program 12 times [2021-11-07 07:54:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:58,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673167989] [2021-11-07 07:54:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:58,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:54:59,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:59,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673167989] [2021-11-07 07:54:59,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673167989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:59,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370419263] [2021-11-07 07:54:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:54:59,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:59,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:59,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:54:59,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 07:54:59,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:54:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-07 07:54:59,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370419263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:59,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:59,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-11-07 07:54:59,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365515839] [2021-11-07 07:54:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:54:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:54:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:54:59,485 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 07:54:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:59,762 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-07 07:54:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:54:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 40 [2021-11-07 07:54:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:59,764 INFO L225 Difference]: With dead ends: 61 [2021-11-07 07:54:59,764 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:54:59,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=962, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:54:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:54:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-11-07 07:54:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 07:54:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-07 07:54:59,771 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 40 [2021-11-07 07:54:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:59,772 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-07 07:54:59,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 07:54:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-07 07:54:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:54:59,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:59,773 INFO L513 BasicCegarLoop]: trace histogram [19, 14, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:59,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:59,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:54:59,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2044022996, now seen corresponding path program 13 times [2021-11-07 07:54:59,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:59,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248164169] [2021-11-07 07:54:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:59,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:55:00,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:00,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248164169] [2021-11-07 07:55:00,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248164169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:00,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809732548] [2021-11-07 07:55:00,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:00,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:00,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:00,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:55:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:00,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:55:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 135 proven. 210 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:55:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809732548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:00,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:00,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:55:00,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131808064] [2021-11-07 07:55:00,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:55:00,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:55:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:55:00,499 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:55:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:00,551 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-11-07 07:55:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:55:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 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 07:55:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:00,552 INFO L225 Difference]: With dead ends: 60 [2021-11-07 07:55:00,552 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 07:55:00,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 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 07:55:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 07:55:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-07 07:55:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 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 07:55:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-07 07:55:00,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 44 [2021-11-07 07:55:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-07 07:55:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 07:55:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-07 07:55:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:55:00,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:00,561 INFO L513 BasicCegarLoop]: trace histogram [20, 15, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:00,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:00,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:00,774 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:00,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:00,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1456868937, now seen corresponding path program 14 times [2021-11-07 07:55:00,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:00,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798094769] [2021-11-07 07:55:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:00,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:55:00,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:00,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798094769] [2021-11-07 07:55:00,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798094769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:00,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124169707] [2021-11-07 07:55:00,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:00,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:00,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:00,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:00,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:55:01,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:55:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:55:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124169707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:01,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:01,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:55:01,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454713591] [2021-11-07 07:55:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:55:01,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:55:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:55:01,300 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:55:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:01,357 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-07 07:55:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:55:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 46 [2021-11-07 07:55:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:01,359 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:55:01,359 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 07:55:01,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 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 07:55:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 07:55:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 07:55:01,369 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 07:55:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-07 07:55:01,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2021-11-07 07:55:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:01,371 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-07 07:55:01,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 07:55:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-07 07:55:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:55:01,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:01,372 INFO L513 BasicCegarLoop]: trace histogram [21, 16, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:01,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:01,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:55:01,587 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1440343514, now seen corresponding path program 15 times [2021-11-07 07:55:01,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:01,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025343279] [2021-11-07 07:55:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:01,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:55:01,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:01,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025343279] [2021-11-07 07:55:01,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025343279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:01,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975160585] [2021-11-07 07:55:01,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:01,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:01,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:01,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:01,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:55:02,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:55:02,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:55:02,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-07 07:55:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975160585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:02,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:02,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-11-07 07:55:02,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972274077] [2021-11-07 07:55:02,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:55:02,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:55:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:55:02,340 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:02,674 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-11-07 07:55:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:55:02,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 07:55:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:02,675 INFO L225 Difference]: With dead ends: 71 [2021-11-07 07:55:02,675 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:55:02,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=633, Invalid=1347, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:55:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:55:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-07 07:55:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-07 07:55:02,682 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 48 [2021-11-07 07:55:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:02,682 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-07 07:55:02,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-07 07:55:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:55:02,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:02,683 INFO L513 BasicCegarLoop]: trace histogram [23, 17, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:02,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:02,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:02,895 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2006408290, now seen corresponding path program 16 times [2021-11-07 07:55:02,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:02,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105350982] [2021-11-07 07:55:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:55:03,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:03,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105350982] [2021-11-07 07:55:03,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105350982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:03,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473779980] [2021-11-07 07:55:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:03,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:03,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:03,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:55:03,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:55:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:55:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473779980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:03,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:55:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702140743] [2021-11-07 07:55:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:55:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:55:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:55:03,529 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:03,585 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-07 07:55:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:55:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 07:55:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:03,586 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:55:03,586 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 07:55:03,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 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 07:55:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 07:55:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-07 07:55:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 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 07:55:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-11-07 07:55:03,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 52 [2021-11-07 07:55:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:03,593 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-11-07 07:55:03,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-11-07 07:55:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:55:03,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:03,594 INFO L513 BasicCegarLoop]: trace histogram [24, 18, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:03,809 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1358588485, now seen corresponding path program 17 times [2021-11-07 07:55:03,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:03,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974161448] [2021-11-07 07:55:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:03,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:55:04,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:04,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974161448] [2021-11-07 07:55:04,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974161448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:04,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783356009] [2021-11-07 07:55:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:04,065 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:04,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:55:04,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-07 07:55:04,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:55:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:55:04,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783356009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:04,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:04,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:55:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000069427] [2021-11-07 07:55:04,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:55:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:55:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:55:04,511 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 07:55:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:04,579 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-11-07 07:55:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:55:04,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 54 [2021-11-07 07:55:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:04,581 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:55:04,581 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 07:55:04,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 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 07:55:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 07:55:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-07 07:55:04,587 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 07:55:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-07 07:55:04,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 54 [2021-11-07 07:55:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-07 07:55:04,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 07:55:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-07 07:55:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:55:04,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:04,589 INFO L513 BasicCegarLoop]: trace histogram [25, 19, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:04,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:04,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:04,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1574013800, now seen corresponding path program 18 times [2021-11-07 07:55:04,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:04,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515239163] [2021-11-07 07:55:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:04,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 380 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:55:05,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:05,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515239163] [2021-11-07 07:55:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515239163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:05,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546811498] [2021-11-07 07:55:05,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:05,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:05,125 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:55:05,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-07 07:55:05,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:55:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-07 07:55:05,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546811498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:05,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:05,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-11-07 07:55:05,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505008428] [2021-11-07 07:55:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:55:05,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:55:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:55:05,704 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:06,124 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-11-07 07:55:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:55:06,128 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 07:55:06,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:06,129 INFO L225 Difference]: With dead ends: 81 [2021-11-07 07:55:06,129 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:55:06,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=1796, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:55:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:55:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-11-07 07:55:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 07:55:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-07 07:55:06,145 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 56 [2021-11-07 07:55:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:06,145 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-07 07:55:06,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-07 07:55:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:55:06,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:06,146 INFO L513 BasicCegarLoop]: trace histogram [27, 20, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:06,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:06,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:55:06,363 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash -821787792, now seen corresponding path program 19 times [2021-11-07 07:55:06,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:06,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253942659] [2021-11-07 07:55:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:06,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:55:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:06,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253942659] [2021-11-07 07:55:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253942659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:06,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893982076] [2021-11-07 07:55:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:06,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:06,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:06,619 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:06,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:55:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:55:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:55:07,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893982076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:07,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:07,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 07:55:07,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282230382] [2021-11-07 07:55:07,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:55:07,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:55:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:55:07,101 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 07:55:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:07,189 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2021-11-07 07:55:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:55:07,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 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 60 [2021-11-07 07:55:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:07,191 INFO L225 Difference]: With dead ends: 80 [2021-11-07 07:55:07,191 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 07:55:07,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 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 07:55:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 07:55:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-07 07:55:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 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 07:55:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-07 07:55:07,207 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-11-07 07:55:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:07,208 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-07 07:55:07,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 07:55:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-07 07:55:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:55:07,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:07,212 INFO L513 BasicCegarLoop]: trace histogram [28, 21, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:07,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:07,439 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2017919405, now seen corresponding path program 20 times [2021-11-07 07:55:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:07,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148805624] [2021-11-07 07:55:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:07,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:55:07,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:07,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148805624] [2021-11-07 07:55:07,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148805624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:07,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417467894] [2021-11-07 07:55:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:07,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:07,708 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:07,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:55:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:55:07,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:55:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417467894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:08,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:08,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-07 07:55:08,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455317344] [2021-11-07 07:55:08,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:55:08,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:55:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:55:08,142 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 07:55:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:08,213 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-11-07 07:55:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:55:08,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 62 [2021-11-07 07:55:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:08,215 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:55:08,215 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 07:55:08,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:55:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 07:55:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-07 07:55:08,219 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 07:55:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-07 07:55:08,220 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-11-07 07:55:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-07 07:55:08,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 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 07:55:08,221 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-07 07:55:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:55:08,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:08,222 INFO L513 BasicCegarLoop]: trace histogram [29, 22, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:08,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:08,435 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -449164170, now seen corresponding path program 21 times [2021-11-07 07:55:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:08,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346933754] [2021-11-07 07:55:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:08,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 506 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:55:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:08,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346933754] [2021-11-07 07:55:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346933754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:08,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219529229] [2021-11-07 07:55:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:08,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:08,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:08,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:55:09,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 07:55:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:55:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-07 07:55:09,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219529229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:09,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:09,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 35 [2021-11-07 07:55:09,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136305975] [2021-11-07 07:55:09,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:55:09,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:55:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=841, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:55:09,428 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 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 07:55:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:09,852 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2021-11-07 07:55:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:55:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 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 64 [2021-11-07 07:55:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:09,853 INFO L225 Difference]: With dead ends: 91 [2021-11-07 07:55:09,853 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:55:09,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1113, Invalid=2309, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:55:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:55:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-07 07:55:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 07:55:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-11-07 07:55:09,861 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 64 [2021-11-07 07:55:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-11-07 07:55:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 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 07:55:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-11-07 07:55:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:55:09,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:09,863 INFO L513 BasicCegarLoop]: trace histogram [31, 23, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:09,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:10,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:10,079 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:10,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2062752258, now seen corresponding path program 22 times [2021-11-07 07:55:10,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:10,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227376978] [2021-11-07 07:55:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:10,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 360 proven. 552 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:55:10,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:10,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227376978] [2021-11-07 07:55:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227376978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:10,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930476228] [2021-11-07 07:55:10,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:10,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:10,431 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:10,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:55:10,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:55:10,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 360 proven. 552 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:55:10,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930476228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:10,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:10,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-07 07:55:10,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320942059] [2021-11-07 07:55:10,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:55:10,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:55:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:55:10,934 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:11,003 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-11-07 07:55:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:55:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:55:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:11,004 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:55:11,004 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:55:11,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 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 07:55:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:55:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-07 07:55:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 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 07:55:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-11-07 07:55:11,009 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 68 [2021-11-07 07:55:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:11,010 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-11-07 07:55:11,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-11-07 07:55:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:55:11,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:11,011 INFO L513 BasicCegarLoop]: trace histogram [32, 24, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:11,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:11,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:11,223 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1599458785, now seen corresponding path program 23 times [2021-11-07 07:55:11,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:11,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691843779] [2021-11-07 07:55:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:11,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:55:11,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:11,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691843779] [2021-11-07 07:55:11,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691843779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:11,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284069700] [2021-11-07 07:55:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:11,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:11,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:11,615 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:55:12,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-11-07 07:55:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:55:12,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 375 proven. 600 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:55:12,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284069700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:12,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:12,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 07:55:12,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097430750] [2021-11-07 07:55:12,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:55:12,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:55:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:55:12,241 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 07:55:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:12,304 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-11-07 07:55:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:55:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 70 [2021-11-07 07:55:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:12,306 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:55:12,306 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 07:55:12,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:55:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 07:55:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-07 07:55:12,311 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 07:55:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-11-07 07:55:12,311 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 70 [2021-11-07 07:55:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:12,312 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-11-07 07:55:12,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 07:55:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-11-07 07:55:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:55:12,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:12,313 INFO L513 BasicCegarLoop]: trace histogram [33, 25, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:12,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:12,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:55:12,523 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash -888911612, now seen corresponding path program 24 times [2021-11-07 07:55:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:12,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445431541] [2021-11-07 07:55:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:12,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 650 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 07:55:12,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:12,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445431541] [2021-11-07 07:55:12,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445431541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:12,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885951046] [2021-11-07 07:55:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:12,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:12,887 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:12,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:55:13,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:55:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:55:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 439 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-07 07:55:13,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885951046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:13,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2021-11-07 07:55:13,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472457440] [2021-11-07 07:55:13,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:55:13,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:55:13,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:55:13,658 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 07:55:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:14,247 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2021-11-07 07:55:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:55:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) Word has length 72 [2021-11-07 07:55:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:14,249 INFO L225 Difference]: With dead ends: 101 [2021-11-07 07:55:14,249 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:55:14,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1404, Invalid=2886, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:55:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:55:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-07 07:55:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2021-11-07 07:55:14,256 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 72 [2021-11-07 07:55:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:14,256 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2021-11-07 07:55:14,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 07:55:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2021-11-07 07:55:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:55:14,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:14,257 INFO L513 BasicCegarLoop]: trace histogram [35, 26, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:14,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:14,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:55:14,458 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash -904354804, now seen corresponding path program 25 times [2021-11-07 07:55:14,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:14,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700547536] [2021-11-07 07:55:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:14,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 459 proven. 702 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:55:14,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:14,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700547536] [2021-11-07 07:55:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700547536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:14,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530998682] [2021-11-07 07:55:14,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:14,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:14,893 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:14,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:55:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:55:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 459 proven. 702 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:55:15,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530998682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:15,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:15,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 07:55:15,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331725223] [2021-11-07 07:55:15,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:55:15,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:55:15,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:55:15,644 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:15,729 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-11-07 07:55:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:55:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 07:55:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:15,730 INFO L225 Difference]: With dead ends: 100 [2021-11-07 07:55:15,730 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 07:55:15,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 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 07:55:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 07:55:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 07:55:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 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 07:55:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-11-07 07:55:15,739 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 76 [2021-11-07 07:55:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:15,740 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-11-07 07:55:15,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-11-07 07:55:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 07:55:15,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:15,741 INFO L513 BasicCegarLoop]: trace histogram [36, 27, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:15,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:15,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:55:15,962 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 356055279, now seen corresponding path program 26 times [2021-11-07 07:55:15,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:15,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083098198] [2021-11-07 07:55:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:15,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 476 proven. 756 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:55:16,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:16,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083098198] [2021-11-07 07:55:16,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083098198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:16,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386066266] [2021-11-07 07:55:16,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:16,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:16,438 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:16,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:55:16,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:16,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:55:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 476 proven. 756 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:55:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386066266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:17,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:17,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-07 07:55:17,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61314874] [2021-11-07 07:55:17,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:55:17,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:55:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:55:17,126 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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 07:55:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:17,213 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2021-11-07 07:55:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:55:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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 78 [2021-11-07 07:55:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:17,214 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:55:17,215 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:55:17,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 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 07:55:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:55:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-07 07:55:17,225 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 07:55:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2021-11-07 07:55:17,226 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 78 [2021-11-07 07:55:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:17,226 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2021-11-07 07:55:17,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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 07:55:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2021-11-07 07:55:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:55:17,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:17,237 INFO L513 BasicCegarLoop]: trace histogram [37, 28, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:17,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-07 07:55:17,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:17,439 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash 429367570, now seen corresponding path program 27 times [2021-11-07 07:55:17,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:17,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497363898] [2021-11-07 07:55:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:17,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 493 proven. 812 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:55:17,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:17,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497363898] [2021-11-07 07:55:17,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497363898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:17,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617502946] [2021-11-07 07:55:17,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:17,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:17,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:17,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:55:18,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 07:55:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:55:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 557 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-07 07:55:18,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617502946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:18,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:18,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2021-11-07 07:55:18,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737880216] [2021-11-07 07:55:18,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:55:18,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:55:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=1271, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:55:18,943 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:55:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:19,534 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2021-11-07 07:55:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:55:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 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 07:55:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:19,535 INFO L225 Difference]: With dead ends: 111 [2021-11-07 07:55:19,535 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:55:19,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1729, Invalid=3527, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:55:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:55:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-11-07 07:55:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:55:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-11-07 07:55:19,543 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 80 [2021-11-07 07:55:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-11-07 07:55:19,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:55:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-11-07 07:55:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 07:55:19,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:19,545 INFO L513 BasicCegarLoop]: trace histogram [39, 29, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:19,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 07:55:19,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:19,759 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash -66593382, now seen corresponding path program 28 times [2021-11-07 07:55:19,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:19,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76666990] [2021-11-07 07:55:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 570 proven. 870 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:55:20,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:20,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76666990] [2021-11-07 07:55:20,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76666990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:20,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946630881] [2021-11-07 07:55:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:20,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:20,200 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:20,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:55:20,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:20,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:55:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 570 proven. 870 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:55:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946630881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:20,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:20,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-07 07:55:20,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997908871] [2021-11-07 07:55:20,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:55:20,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:55:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:55:20,920 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 07:55:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:21,006 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-11-07 07:55:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:55:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 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 84 [2021-11-07 07:55:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:21,007 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:55:21,008 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 07:55:21,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:55:21,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 07:55:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-07 07:55:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 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 07:55:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-11-07 07:55:21,015 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 84 [2021-11-07 07:55:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:21,015 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-11-07 07:55:21,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 07:55:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-11-07 07:55:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:55:21,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:21,017 INFO L513 BasicCegarLoop]: trace histogram [40, 30, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:21,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:21,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:21,235 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash 339910525, now seen corresponding path program 29 times [2021-11-07 07:55:21,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:21,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278872313] [2021-11-07 07:55:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:21,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 930 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:55:21,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:21,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278872313] [2021-11-07 07:55:21,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278872313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:21,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117556077] [2021-11-07 07:55:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:21,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:21,684 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:21,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:55:22,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-11-07 07:55:22,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:55:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 930 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:55:22,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117556077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:22,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:22,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 07:55:22,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581595060] [2021-11-07 07:55:22,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:55:22,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:55:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:55:22,345 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 07:55:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:22,428 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2021-11-07 07:55:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:55:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 86 [2021-11-07 07:55:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:22,430 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:55:22,430 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 07:55:22,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:55:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 07:55:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-07 07:55:22,438 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 07:55:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-07 07:55:22,441 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 86 [2021-11-07 07:55:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:22,441 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-07 07:55:22,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 07:55:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-07 07:55:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 07:55:22,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:22,443 INFO L513 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:22,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:22,671 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash 148141216, now seen corresponding path program 30 times [2021-11-07 07:55:22,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:22,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826083213] [2021-11-07 07:55:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:22,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:55:23,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:23,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826083213] [2021-11-07 07:55:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826083213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:23,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028756885] [2021-11-07 07:55:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:23,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:23,208 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:23,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:55:23,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-07 07:55:23,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:55:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-07 07:55:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028756885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:24,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:24,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 15] total 47 [2021-11-07 07:55:24,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678148123] [2021-11-07 07:55:24,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:55:24,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:55:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=1519, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:55:24,291 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 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 07:55:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:24,901 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-11-07 07:55:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:55:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 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 88 [2021-11-07 07:55:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:24,902 INFO L225 Difference]: With dead ends: 121 [2021-11-07 07:55:24,902 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:55:24,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2088, Invalid=4232, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:55:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:55:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-07 07:55:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 07:55:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-07 07:55:24,909 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 88 [2021-11-07 07:55:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:24,910 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-07 07:55:24,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 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 07:55:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-07 07:55:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:55:24,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:24,911 INFO L513 BasicCegarLoop]: trace histogram [43, 32, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:24,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:25,127 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash 674411176, now seen corresponding path program 31 times [2021-11-07 07:55:25,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:25,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631651436] [2021-11-07 07:55:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:25,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 693 proven. 1056 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:55:25,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:25,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631651436] [2021-11-07 07:55:25,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631651436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:25,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807699184] [2021-11-07 07:55:25,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:25,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:25,647 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:55:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:55:26,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 693 proven. 1056 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:55:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807699184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:26,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:26,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 07:55:26,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863820105] [2021-11-07 07:55:26,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:55:26,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:55:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:55:26,413 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 07:55:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:26,502 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2021-11-07 07:55:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:55:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 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 07:55:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:26,503 INFO L225 Difference]: With dead ends: 120 [2021-11-07 07:55:26,503 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 07:55:26,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 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 07:55:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 07:55:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-07 07:55:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.127659574468085) internal successors, (106), 94 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 07:55:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-07 07:55:26,510 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 92 [2021-11-07 07:55:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:26,510 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-07 07:55:26,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 07:55:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-07 07:55:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:55:26,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:26,511 INFO L513 BasicCegarLoop]: trace histogram [44, 33, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:26,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:26,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:55:26,739 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1993007499, now seen corresponding path program 32 times [2021-11-07 07:55:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190854584] [2021-11-07 07:55:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:26,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:55:27,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:27,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190854584] [2021-11-07 07:55:27,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190854584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:27,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333754859] [2021-11-07 07:55:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:27,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:27,255 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:55:27,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:27,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:55:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:55:27,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333754859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:27,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:27,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-07 07:55:27,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010308286] [2021-11-07 07:55:27,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:55:27,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:55:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:55:27,992 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 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 07:55:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:28,067 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2021-11-07 07:55:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:55:28,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 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 94 [2021-11-07 07:55:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:28,068 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:55:28,068 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 07:55:28,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 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 07:55:28,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 07:55:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-07 07:55:28,087 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 07:55:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-11-07 07:55:28,088 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 94 [2021-11-07 07:55:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-11-07 07:55:28,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 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 07:55:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-11-07 07:55:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:55:28,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:28,090 INFO L513 BasicCegarLoop]: trace histogram [45, 34, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:28,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:28,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:55:28,291 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2146245714, now seen corresponding path program 33 times [2021-11-07 07:55:28,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:28,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606077957] [2021-11-07 07:55:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:28,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 1190 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:55:28,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:28,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606077957] [2021-11-07 07:55:28,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606077957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:28,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974130720] [2021-11-07 07:55:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:28,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:28,837 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:28,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:55:29,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:55:29,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:29,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:55:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 835 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-11-07 07:55:29,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974130720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:29,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:29,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2021-11-07 07:55:29,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267341687] [2021-11-07 07:55:29,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:55:29,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:29,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:55:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=1789, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:55:29,892 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:55:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:30,654 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2021-11-07 07:55:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:55:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 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 96 [2021-11-07 07:55:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:30,655 INFO L225 Difference]: With dead ends: 131 [2021-11-07 07:55:30,655 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:55:30,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2481, Invalid=5001, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:55:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:55:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2021-11-07 07:55:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 07:55:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-11-07 07:55:30,662 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 96 [2021-11-07 07:55:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:30,662 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-11-07 07:55:30,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 07:55:30,663 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-11-07 07:55:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:55:30,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:30,664 INFO L513 BasicCegarLoop]: trace histogram [47, 35, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:30,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 07:55:30,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:55:30,871 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 225002294, now seen corresponding path program 34 times [2021-11-07 07:55:30,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:30,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120298873] [2021-11-07 07:55:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 828 proven. 1260 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:55:31,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:31,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120298873] [2021-11-07 07:55:31,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120298873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:31,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387547860] [2021-11-07 07:55:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:31,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:31,495 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:31,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:55:32,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:32,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:55:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 828 proven. 1260 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:55:32,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387547860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:32,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:32,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 07:55:32,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135385092] [2021-11-07 07:55:32,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:55:32,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:32,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:55:32,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:55:32,373 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 07:55:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:32,447 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-11-07 07:55:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:55:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 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 100 [2021-11-07 07:55:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:32,450 INFO L225 Difference]: With dead ends: 130 [2021-11-07 07:55:32,450 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 07:55:32,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:55:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 07:55:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-07 07:55:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 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 07:55:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-11-07 07:55:32,458 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 100 [2021-11-07 07:55:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:32,459 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-11-07 07:55:32,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 07:55:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-11-07 07:55:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:55:32,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:32,461 INFO L513 BasicCegarLoop]: trace histogram [48, 36, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:32,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 07:55:32,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:55:32,687 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 144826137, now seen corresponding path program 35 times [2021-11-07 07:55:32,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:32,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428475174] [2021-11-07 07:55:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:32,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:55:33,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:33,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428475174] [2021-11-07 07:55:33,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428475174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:33,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800948910] [2021-11-07 07:55:33,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:33,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:33,351 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:33,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:55:33,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-07 07:55:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:33,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:55:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:55:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800948910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:34,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 07:55:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623375805] [2021-11-07 07:55:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:55:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:55:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:55:34,263 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 07:55:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:34,346 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2021-11-07 07:55:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:55:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 102 [2021-11-07 07:55:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:34,347 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:55:34,347 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 07:55:34,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 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 07:55:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 07:55:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-07 07:55:34,352 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 07:55:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-11-07 07:55:34,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 102 [2021-11-07 07:55:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:34,353 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-11-07 07:55:34,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 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 07:55:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-11-07 07:55:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:55:34,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:34,354 INFO L513 BasicCegarLoop]: trace histogram [49, 37, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:34,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:34,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:34,567 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash 404950588, now seen corresponding path program 36 times [2021-11-07 07:55:34,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:34,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348828600] [2021-11-07 07:55:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:34,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 07:55:35,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:35,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348828600] [2021-11-07 07:55:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348828600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:35,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334841675] [2021-11-07 07:55:35,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:35,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:35,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:35,253 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:35,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:55:35,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-11-07 07:55:35,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:55:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-11-07 07:55:36,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334841675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:36,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:36,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2021-11-07 07:55:36,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656779498] [2021-11-07 07:55:36,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 07:55:36,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 07:55:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=2081, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:55:36,510 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 07:55:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:37,314 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-07 07:55:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 07:55:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 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 07:55:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:37,315 INFO L225 Difference]: With dead ends: 141 [2021-11-07 07:55:37,316 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 07:55:37,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2908, Invalid=5834, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:55:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 07:55:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-11-07 07:55:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-11-07 07:55:37,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 104 [2021-11-07 07:55:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-11-07 07:55:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 07:55:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-11-07 07:55:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 07:55:37,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:37,325 INFO L513 BasicCegarLoop]: trace histogram [51, 38, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:37,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:55:37,535 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1644974268, now seen corresponding path program 37 times [2021-11-07 07:55:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:37,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644074976] [2021-11-07 07:55:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:37,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 975 proven. 1482 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:55:38,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:38,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644074976] [2021-11-07 07:55:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644074976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:38,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808360369] [2021-11-07 07:55:38,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:38,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:38,158 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:55:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:55:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 975 proven. 1482 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:55:39,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808360369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:39,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:39,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 07:55:39,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439465476] [2021-11-07 07:55:39,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:55:39,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:39,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:55:39,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:55:39,100 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:55:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:39,214 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2021-11-07 07:55:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:55:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 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 108 [2021-11-07 07:55:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:39,216 INFO L225 Difference]: With dead ends: 140 [2021-11-07 07:55:39,216 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 07:55:39,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:55:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 07:55:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-07 07:55:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1272727272727272) internal successors, (124), 110 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 07:55:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2021-11-07 07:55:39,224 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 108 [2021-11-07 07:55:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:39,225 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2021-11-07 07:55:39,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 07:55:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2021-11-07 07:55:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:55:39,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:39,227 INFO L513 BasicCegarLoop]: trace histogram [52, 39, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:39,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:39,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 07:55:39,440 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -921716697, now seen corresponding path program 38 times [2021-11-07 07:55:39,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:39,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318719911] [2021-11-07 07:55:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:39,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1000 proven. 1560 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:55:40,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:40,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318719911] [2021-11-07 07:55:40,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318719911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:40,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292992076] [2021-11-07 07:55:40,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:40,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:40,100 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:40,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:55:40,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:55:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1000 proven. 1560 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:55:41,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292992076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:41,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:41,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-07 07:55:41,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301280283] [2021-11-07 07:55:41,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:55:41,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:41,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:55:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:55:41,069 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 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 07:55:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:41,200 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2021-11-07 07:55:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:55:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 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 110 [2021-11-07 07:55:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:41,207 INFO L225 Difference]: With dead ends: 142 [2021-11-07 07:55:41,207 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 07:55:41,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:55:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 07:55:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-07 07:55:41,214 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 07:55:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2021-11-07 07:55:41,215 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 110 [2021-11-07 07:55:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:41,215 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2021-11-07 07:55:41,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 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 07:55:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2021-11-07 07:55:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:55:41,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:41,217 INFO L513 BasicCegarLoop]: trace histogram [53, 40, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:41,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:41,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:41,423 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1655892918, now seen corresponding path program 39 times [2021-11-07 07:55:41,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:41,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430159216] [2021-11-07 07:55:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:41,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 1640 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:55:42,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:42,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430159216] [2021-11-07 07:55:42,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430159216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:42,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954933893] [2021-11-07 07:55:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:42,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:42,181 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:55:42,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-07 07:55:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:55:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 1169 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-07 07:55:43,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954933893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:43,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:43,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 18] total 59 [2021-11-07 07:55:43,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132325593] [2021-11-07 07:55:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:55:43,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:55:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=2395, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:55:43,505 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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 07:55:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:44,484 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2021-11-07 07:55:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:55:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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 112 [2021-11-07 07:55:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:44,486 INFO L225 Difference]: With dead ends: 151 [2021-11-07 07:55:44,486 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:55:44,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3369, Invalid=6731, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:55:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:55:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-11-07 07:55:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 07:55:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-11-07 07:55:44,494 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 112 [2021-11-07 07:55:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:44,495 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-11-07 07:55:44,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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 07:55:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-11-07 07:55:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 07:55:44,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:44,496 INFO L513 BasicCegarLoop]: trace histogram [55, 41, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:44,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:44,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:44,711 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash 26351314, now seen corresponding path program 40 times [2021-11-07 07:55:44,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:44,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837611019] [2021-11-07 07:55:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1134 proven. 1722 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:55:45,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:45,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837611019] [2021-11-07 07:55:45,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837611019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:45,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625356698] [2021-11-07 07:55:45,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:45,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:45,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:45,469 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:45,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:55:46,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:55:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1134 proven. 1722 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:55:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625356698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:46,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:46,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 07:55:46,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729841924] [2021-11-07 07:55:46,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:55:46,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:55:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:55:46,535 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:55:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:46,651 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-11-07 07:55:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:55:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 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 07:55:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:46,653 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:55:46,653 INFO L226 Difference]: Without dead ends: 119 [2021-11-07 07:55:46,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:55:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-07 07:55:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-07 07:55:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1271186440677967) internal successors, (133), 118 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 07:55:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 133 transitions. [2021-11-07 07:55:46,660 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 133 transitions. Word has length 116 [2021-11-07 07:55:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:46,660 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 133 transitions. [2021-11-07 07:55:46,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:55:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 133 transitions. [2021-11-07 07:55:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:55:46,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:46,662 INFO L513 BasicCegarLoop]: trace histogram [56, 42, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:46,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 07:55:46,887 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -321614667, now seen corresponding path program 41 times [2021-11-07 07:55:46,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:46,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823848706] [2021-11-07 07:55:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:46,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1161 proven. 1806 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:55:47,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:47,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823848706] [2021-11-07 07:55:47,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823848706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:47,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407234564] [2021-11-07 07:55:47,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:47,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:47,707 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:47,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:55:48,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 57 check-sat command(s) [2021-11-07 07:55:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:48,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:55:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1161 proven. 1806 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:55:48,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407234564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:48,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:48,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-07 07:55:48,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724268813] [2021-11-07 07:55:48,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:55:48,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:55:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:55:48,848 INFO L87 Difference]: Start difference. First operand 119 states and 133 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 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 07:55:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:48,966 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2021-11-07 07:55:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:55:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 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 118 [2021-11-07 07:55:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:48,967 INFO L225 Difference]: With dead ends: 152 [2021-11-07 07:55:48,968 INFO L226 Difference]: Without dead ends: 121 [2021-11-07 07:55:48,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:55:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-07 07:55:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-07 07:55:48,974 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 07:55:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2021-11-07 07:55:48,975 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 118 [2021-11-07 07:55:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:48,976 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2021-11-07 07:55:48,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 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 07:55:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2021-11-07 07:55:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 07:55:48,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:48,977 INFO L513 BasicCegarLoop]: trace histogram [57, 43, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:49,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:49,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:55:49,178 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash 290526680, now seen corresponding path program 42 times [2021-11-07 07:55:49,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:49,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775147810] [2021-11-07 07:55:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:49,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1188 proven. 1892 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 07:55:50,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:50,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775147810] [2021-11-07 07:55:50,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775147810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:50,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635151253] [2021-11-07 07:55:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:50,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:50,010 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:50,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:55:50,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-07 07:55:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:50,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:55:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-11-07 07:55:51,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635151253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:51,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:51,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-11-07 07:55:51,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538038213] [2021-11-07 07:55:51,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:55:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:55:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:55:51,572 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 63 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:52,895 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2021-11-07 07:55:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:55:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 63 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 07:55:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:52,897 INFO L225 Difference]: With dead ends: 161 [2021-11-07 07:55:52,897 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:55:52,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3864, Invalid=7692, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:55:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:55:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2021-11-07 07:55:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 124 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 07:55:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2021-11-07 07:55:52,906 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 120 [2021-11-07 07:55:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:52,907 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2021-11-07 07:55:52,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 63 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2021-11-07 07:55:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 07:55:52,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:52,909 INFO L513 BasicCegarLoop]: trace histogram [59, 44, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:52,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:53,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:53,127 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:53,127 INFO L85 PathProgramCache]: Analyzing trace with hash 394041824, now seen corresponding path program 43 times [2021-11-07 07:55:53,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:53,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638624150] [2021-11-07 07:55:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:53,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1305 proven. 1980 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:55:54,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:54,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638624150] [2021-11-07 07:55:54,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638624150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:54,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594525322] [2021-11-07 07:55:54,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:54,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:54,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:54,068 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:54,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:55:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:55:54,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1305 proven. 1980 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:55:55,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594525322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:55,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:55,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 07:55:55,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138236297] [2021-11-07 07:55:55,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:55:55,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:55:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:55:55,257 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:55,391 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-11-07 07:55:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:55:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 07:55:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:55,393 INFO L225 Difference]: With dead ends: 160 [2021-11-07 07:55:55,393 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 07:55:55,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 124 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 07:55:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 07:55:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-07 07:55:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.126984126984127) internal successors, (142), 126 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 07:55:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2021-11-07 07:55:55,400 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 124 [2021-11-07 07:55:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:55,401 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2021-11-07 07:55:55,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2021-11-07 07:55:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:55:55,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:55,402 INFO L513 BasicCegarLoop]: trace histogram [60, 45, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:55,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:55,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:55,618 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:55,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1613266115, now seen corresponding path program 44 times [2021-11-07 07:55:55,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:55,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251043163] [2021-11-07 07:55:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:55,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1334 proven. 2070 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:55:56,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:56,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251043163] [2021-11-07 07:55:56,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251043163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:56,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712741843] [2021-11-07 07:55:56,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:56,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:56,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:56,483 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:56,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:55:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 07:55:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1334 proven. 2070 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:55:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712741843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:57,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:57,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-07 07:55:57,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338360364] [2021-11-07 07:55:57,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:55:57,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:57,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:55:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:55:57,766 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 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 07:55:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:57,890 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2021-11-07 07:55:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:55:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 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 126 [2021-11-07 07:55:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:57,892 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:55:57,893 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 07:55:57,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:55:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 07:55:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-07 07:55:57,899 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 07:55:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-11-07 07:55:57,900 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 126 [2021-11-07 07:55:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:57,900 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-11-07 07:55:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 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 07:55:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-11-07 07:55:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:55:57,902 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:57,902 INFO L513 BasicCegarLoop]: trace histogram [61, 46, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:57,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:58,115 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash 761737958, now seen corresponding path program 45 times [2021-11-07 07:55:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:58,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238224643] [2021-11-07 07:55:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1363 proven. 2162 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 07:55:59,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:59,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238224643] [2021-11-07 07:55:59,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238224643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:59,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090616014] [2021-11-07 07:55:59,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:59,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:59,126 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:59,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:56:00,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 07:56:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:56:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 1559 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-07 07:56:00,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090616014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:00,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:00,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 20] total 67 [2021-11-07 07:56:00,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826606562] [2021-11-07 07:56:00,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 07:56:00,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 07:56:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3089, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:56:00,813 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 67 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:02,086 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2021-11-07 07:56:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 07:56:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 67 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-07 07:56:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:02,088 INFO L225 Difference]: With dead ends: 171 [2021-11-07 07:56:02,088 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 07:56:02,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4393, Invalid=8717, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 07:56:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 07:56:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-11-07 07:56:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.128787878787879) internal successors, (149), 132 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2021-11-07 07:56:02,098 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 128 [2021-11-07 07:56:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:02,099 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2021-11-07 07:56:02,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.044776119402985) internal successors, (137), 67 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2021-11-07 07:56:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 07:56:02,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:02,100 INFO L513 BasicCegarLoop]: trace histogram [63, 47, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:02,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:02,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:56:02,327 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2019776622, now seen corresponding path program 46 times [2021-11-07 07:56:02,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:02,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877502786] [2021-11-07 07:56:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:02,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1488 proven. 2256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:56:03,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:03,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877502786] [2021-11-07 07:56:03,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877502786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:03,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27375451] [2021-11-07 07:56:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:03,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:03,281 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:03,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:56:04,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:04,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:56:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1488 proven. 2256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:56:04,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27375451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:04,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:04,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-07 07:56:04,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642022707] [2021-11-07 07:56:04,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:56:04,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:56:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:56:04,602 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:56:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:04,702 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2021-11-07 07:56:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:56:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 132 [2021-11-07 07:56:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:04,704 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:56:04,704 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 07:56:04,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:56:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 07:56:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-07 07:56:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 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 07:56:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-11-07 07:56:04,711 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 132 [2021-11-07 07:56:04,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:04,712 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-11-07 07:56:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 07:56:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-11-07 07:56:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:56:04,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:04,713 INFO L513 BasicCegarLoop]: trace histogram [64, 48, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:04,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:04,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:56:04,939 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -927225775, now seen corresponding path program 47 times [2021-11-07 07:56:04,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:04,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052026067] [2021-11-07 07:56:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:04,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1519 proven. 2352 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:56:06,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:06,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052026067] [2021-11-07 07:56:06,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052026067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:06,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23546796] [2021-11-07 07:56:06,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:06,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:06,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:06,129 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:56:07,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-11-07 07:56:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:56:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1519 proven. 2352 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:56:07,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23546796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:07,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:07,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-07 07:56:07,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504916832] [2021-11-07 07:56:07,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 07:56:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 07:56:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:56:07,740 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 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 07:56:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:07,847 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2021-11-07 07:56:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:56:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 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 134 [2021-11-07 07:56:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:07,848 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:56:07,849 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 07:56:07,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:56:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 07:56:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 07:56:07,856 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 07:56:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2021-11-07 07:56:07,857 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 134 [2021-11-07 07:56:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:07,857 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2021-11-07 07:56:07,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 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 07:56:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2021-11-07 07:56:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 07:56:07,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:07,859 INFO L513 BasicCegarLoop]: trace histogram [65, 49, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:07,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-07 07:56:08,087 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1681886068, now seen corresponding path program 48 times [2021-11-07 07:56:08,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:08,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341433918] [2021-11-07 07:56:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:08,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1550 proven. 2450 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:56:09,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:09,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341433918] [2021-11-07 07:56:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341433918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:09,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046179092] [2021-11-07 07:56:09,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:09,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:09,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:09,156 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:09,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:56:10,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-11-07 07:56:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:56:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 1775 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-11-07 07:56:11,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046179092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:11,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:11,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 21] total 71 [2021-11-07 07:56:11,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276824522] [2021-11-07 07:56:11,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:56:11,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:56:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1501, Invalid=3469, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:56:11,072 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 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 07:56:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:12,440 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2021-11-07 07:56:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:56:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 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 136 [2021-11-07 07:56:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:12,442 INFO L225 Difference]: With dead ends: 181 [2021-11-07 07:56:12,442 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:56:12,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4956, Invalid=9806, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:56:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:56:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-11-07 07:56:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 140 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 07:56:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2021-11-07 07:56:12,452 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 136 [2021-11-07 07:56:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:12,453 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2021-11-07 07:56:12,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 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 07:56:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2021-11-07 07:56:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:56:12,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:12,455 INFO L513 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:12,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:12,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:12,683 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:12,683 INFO L85 PathProgramCache]: Analyzing trace with hash -126979460, now seen corresponding path program 49 times [2021-11-07 07:56:12,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:12,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350648259] [2021-11-07 07:56:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:12,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 1683 proven. 2550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:56:13,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:13,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350648259] [2021-11-07 07:56:13,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350648259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:13,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118150882] [2021-11-07 07:56:13,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:13,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:13,725 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:13,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:56:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:56:14,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 1683 proven. 2550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:56:15,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118150882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:15,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-07 07:56:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130926189] [2021-11-07 07:56:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:56:15,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:56:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:56:15,140 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 07:56:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:15,296 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-11-07 07:56:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:56:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 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 07:56:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:15,298 INFO L225 Difference]: With dead ends: 180 [2021-11-07 07:56:15,298 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 07:56:15,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:56:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 07:56:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-07 07:56:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1267605633802817) internal successors, (160), 142 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 07:56:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-11-07 07:56:15,306 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 140 [2021-11-07 07:56:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:15,307 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-11-07 07:56:15,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 07:56:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-11-07 07:56:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 07:56:15,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:15,308 INFO L513 BasicCegarLoop]: trace histogram [68, 51, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:15,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:15,523 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash 129380191, now seen corresponding path program 50 times [2021-11-07 07:56:15,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:15,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738226260] [2021-11-07 07:56:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:15,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1716 proven. 2652 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:56:16,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:16,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738226260] [2021-11-07 07:56:16,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738226260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:16,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565199863] [2021-11-07 07:56:16,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:16,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:16,647 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:16,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:56:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 07:56:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1716 proven. 2652 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:56:18,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565199863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:18,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:18,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-07 07:56:18,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243968936] [2021-11-07 07:56:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 07:56:18,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 07:56:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:56:18,138 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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 07:56:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:18,251 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2021-11-07 07:56:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:56:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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 142 [2021-11-07 07:56:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:18,252 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:56:18,252 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 07:56:18,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:56:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 07:56:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 07:56:18,260 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 07:56:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-07 07:56:18,261 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 142 [2021-11-07 07:56:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:18,261 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-07 07:56:18,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 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 07:56:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-07 07:56:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 07:56:18,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:18,263 INFO L513 BasicCegarLoop]: trace histogram [69, 52, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:18,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:18,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 07:56:18,480 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1677868930, now seen corresponding path program 51 times [2021-11-07 07:56:18,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:18,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424298287] [2021-11-07 07:56:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:18,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1749 proven. 2756 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-07 07:56:19,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:19,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424298287] [2021-11-07 07:56:19,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424298287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:19,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93801390] [2021-11-07 07:56:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:19,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:19,611 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:19,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:56:20,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:56:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:56:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 2005 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2021-11-07 07:56:21,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93801390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:21,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:21,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 22] total 75 [2021-11-07 07:56:21,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340903542] [2021-11-07 07:56:21,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:56:21,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:56:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1679, Invalid=3871, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:56:21,678 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 75 states, 75 states have (on average 2.04) internal successors, (153), 75 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 07:56:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:23,068 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2021-11-07 07:56:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 07:56:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 07:56:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:23,069 INFO L225 Difference]: With dead ends: 191 [2021-11-07 07:56:23,069 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 07:56:23,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5553, Invalid=10959, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:56:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 07:56:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2021-11-07 07:56:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 148 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 07:56:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-11-07 07:56:23,079 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 144 [2021-11-07 07:56:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-11-07 07:56:23,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.04) internal successors, (153), 75 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 07:56:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-11-07 07:56:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 07:56:23,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:23,080 INFO L513 BasicCegarLoop]: trace histogram [71, 53, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:23,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 07:56:23,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:23,295 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1455552502, now seen corresponding path program 52 times [2021-11-07 07:56:23,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:23,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857173004] [2021-11-07 07:56:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:23,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 1890 proven. 2862 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:56:24,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:24,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857173004] [2021-11-07 07:56:24,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857173004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:24,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884778884] [2021-11-07 07:56:24,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:24,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:24,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:24,420 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:24,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:56:25,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:25,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:56:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 1890 proven. 2862 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:56:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884778884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:25,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:25,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-07 07:56:25,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777120565] [2021-11-07 07:56:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:56:25,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:25,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:56:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:56:25,966 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:26,076 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-11-07 07:56:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:56:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 07:56:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:26,077 INFO L225 Difference]: With dead ends: 190 [2021-11-07 07:56:26,077 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 07:56:26,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:56:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 07:56:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-07 07:56:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 150 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 07:56:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2021-11-07 07:56:26,086 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 148 [2021-11-07 07:56:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2021-11-07 07:56:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2021-11-07 07:56:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 07:56:26,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:26,088 INFO L513 BasicCegarLoop]: trace histogram [72, 54, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:26,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 07:56:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:26,315 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1001927149, now seen corresponding path program 53 times [2021-11-07 07:56:26,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:26,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462481289] [2021-11-07 07:56:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:26,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1925 proven. 2970 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:56:27,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:27,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462481289] [2021-11-07 07:56:27,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462481289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:27,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569002626] [2021-11-07 07:56:27,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:27,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:27,462 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:27,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:56:28,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-11-07 07:56:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:56:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1925 proven. 2970 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:56:29,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569002626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:29,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:29,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-07 07:56:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917957154] [2021-11-07 07:56:29,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 07:56:29,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 07:56:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:56:29,134 INFO L87 Difference]: Start difference. First operand 151 states and 169 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 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 07:56:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:29,282 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2021-11-07 07:56:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 07:56:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 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 150 [2021-11-07 07:56:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:29,283 INFO L225 Difference]: With dead ends: 192 [2021-11-07 07:56:29,283 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 07:56:29,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:56:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 07:56:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-07 07:56:29,292 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 07:56:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2021-11-07 07:56:29,292 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 150 [2021-11-07 07:56:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:29,293 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2021-11-07 07:56:29,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 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 07:56:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2021-11-07 07:56:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 07:56:29,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:29,294 INFO L513 BasicCegarLoop]: trace histogram [73, 55, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:29,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:56:29,515 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:29,515 INFO L85 PathProgramCache]: Analyzing trace with hash 407858960, now seen corresponding path program 54 times [2021-11-07 07:56:29,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:29,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369909732] [2021-11-07 07:56:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:29,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1960 proven. 3080 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-07 07:56:30,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:30,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369909732] [2021-11-07 07:56:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369909732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:30,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698851934] [2021-11-07 07:56:30,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:30,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:30,856 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:30,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:56:32,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2021-11-07 07:56:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:32,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:56:32,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 2249 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-07 07:56:33,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698851934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:33,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:33,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 23] total 79 [2021-11-07 07:56:33,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435068408] [2021-11-07 07:56:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:56:33,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:56:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1867, Invalid=4295, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:56:33,123 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:34,707 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2021-11-07 07:56:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:56:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-07 07:56:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:34,713 INFO L225 Difference]: With dead ends: 201 [2021-11-07 07:56:34,714 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:56:34,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6184, Invalid=12176, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:56:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:56:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-11-07 07:56:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 156 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2021-11-07 07:56:34,723 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 152 [2021-11-07 07:56:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2021-11-07 07:56:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2021-11-07 07:56:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 07:56:34,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:34,725 INFO L513 BasicCegarLoop]: trace histogram [75, 56, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:34,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 07:56:34,931 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1542076696, now seen corresponding path program 55 times [2021-11-07 07:56:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:34,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208007067] [2021-11-07 07:56:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:34,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2109 proven. 3192 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:56:36,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:36,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208007067] [2021-11-07 07:56:36,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208007067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:36,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571977862] [2021-11-07 07:56:36,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:36,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:36,179 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:36,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:56:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:56:37,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2109 proven. 3192 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:56:37,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571977862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:37,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:37,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-07 07:56:37,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032675020] [2021-11-07 07:56:37,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:56:37,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:56:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:56:37,875 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 07:56:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:37,983 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-11-07 07:56:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:56:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 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 156 [2021-11-07 07:56:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:37,984 INFO L225 Difference]: With dead ends: 200 [2021-11-07 07:56:37,984 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 07:56:37,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:56:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 07:56:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-07 07:56:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 158 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 178 transitions. [2021-11-07 07:56:37,994 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 178 transitions. Word has length 156 [2021-11-07 07:56:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:37,994 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 178 transitions. [2021-11-07 07:56:37,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 07:56:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 178 transitions. [2021-11-07 07:56:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:56:37,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:37,996 INFO L513 BasicCegarLoop]: trace histogram [76, 57, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:38,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-07 07:56:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 07:56:38,199 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1121570811, now seen corresponding path program 56 times [2021-11-07 07:56:38,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:38,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258250923] [2021-11-07 07:56:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:38,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2146 proven. 3306 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:56:39,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:39,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258250923] [2021-11-07 07:56:39,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258250923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:39,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97903153] [2021-11-07 07:56:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:39,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:39,448 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:39,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:56:40,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:40,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 07:56:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2146 proven. 3306 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:56:41,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97903153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:41,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:41,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-07 07:56:41,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318297246] [2021-11-07 07:56:41,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 07:56:41,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 07:56:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:56:41,199 INFO L87 Difference]: Start difference. First operand 159 states and 178 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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 07:56:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:41,333 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-11-07 07:56:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 07:56:41,334 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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 158 [2021-11-07 07:56:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:41,335 INFO L225 Difference]: With dead ends: 202 [2021-11-07 07:56:41,335 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 07:56:41,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:56:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 07:56:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 07:56:41,341 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 07:56:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2021-11-07 07:56:41,342 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 158 [2021-11-07 07:56:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:41,342 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2021-11-07 07:56:41,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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 07:56:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2021-11-07 07:56:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 07:56:41,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:41,344 INFO L513 BasicCegarLoop]: trace histogram [77, 58, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:41,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:41,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 07:56:41,550 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash 742341150, now seen corresponding path program 57 times [2021-11-07 07:56:41,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:41,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414855230] [2021-11-07 07:56:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:41,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2183 proven. 3422 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 07:56:42,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:42,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414855230] [2021-11-07 07:56:42,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414855230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:42,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708267834] [2021-11-07 07:56:42,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:42,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:42,897 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:42,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:56:44,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-11-07 07:56:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:56:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 2507 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-11-07 07:56:45,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708267834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:45,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:45,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 24] total 83 [2021-11-07 07:56:45,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842307534] [2021-11-07 07:56:45,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:56:45,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:56:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2065, Invalid=4741, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:56:45,321 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 83 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 07:56:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:46,953 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2021-11-07 07:56:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:56:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 83 states have internal predecessors, (169), 0 states have call successors, (0), 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 160 [2021-11-07 07:56:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:46,954 INFO L225 Difference]: With dead ends: 211 [2021-11-07 07:56:46,955 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:56:46,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3085 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6849, Invalid=13457, Unknown=0, NotChecked=0, Total=20306 [2021-11-07 07:56:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:56:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2021-11-07 07:56:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1280487804878048) internal successors, (185), 164 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:56:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2021-11-07 07:56:46,965 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 160 [2021-11-07 07:56:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:46,966 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2021-11-07 07:56:46,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.036144578313253) internal successors, (169), 83 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 07:56:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2021-11-07 07:56:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:56:46,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:46,967 INFO L513 BasicCegarLoop]: trace histogram [79, 59, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:46,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:47,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:47,171 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:47,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1560074842, now seen corresponding path program 58 times [2021-11-07 07:56:47,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:47,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930965049] [2021-11-07 07:56:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:47,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 2340 proven. 3540 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:56:48,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:48,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930965049] [2021-11-07 07:56:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930965049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:48,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867443448] [2021-11-07 07:56:48,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:48,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:48,649 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:48,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:56:50,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:50,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 07:56:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 2340 proven. 3540 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:56:50,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867443448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:50,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:50,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-07 07:56:50,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846956760] [2021-11-07 07:56:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:56:50,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:56:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:56:50,513 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 07:56:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:50,644 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-11-07 07:56:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:56:50,644 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 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 164 [2021-11-07 07:56:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:50,645 INFO L225 Difference]: With dead ends: 210 [2021-11-07 07:56:50,646 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:56:50,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:56:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:56:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-07 07:56:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 166 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 07:56:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-11-07 07:56:50,654 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 164 [2021-11-07 07:56:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:50,654 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-11-07 07:56:50,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 07:56:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-11-07 07:56:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 07:56:50,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:50,656 INFO L513 BasicCegarLoop]: trace histogram [80, 60, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:50,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:50,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:50,856 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1129633399, now seen corresponding path program 59 times [2021-11-07 07:56:50,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:50,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954037443] [2021-11-07 07:56:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:50,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2379 proven. 3660 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:56:52,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:52,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954037443] [2021-11-07 07:56:52,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954037443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:52,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994878544] [2021-11-07 07:56:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:52,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:52,245 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:52,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:56:53,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2021-11-07 07:56:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:53,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 07:56:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2379 proven. 3660 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:56:54,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994878544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:54,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:54,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-07 07:56:54,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801656962] [2021-11-07 07:56:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 07:56:54,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 07:56:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:56:54,205 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 07:56:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:54,343 INFO L93 Difference]: Finished difference Result 212 states and 252 transitions. [2021-11-07 07:56:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:56:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 166 [2021-11-07 07:56:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:54,344 INFO L225 Difference]: With dead ends: 212 [2021-11-07 07:56:54,344 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 07:56:54,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:56:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 07:56:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-07 07:56:54,353 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 07:56:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2021-11-07 07:56:54,354 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 166 [2021-11-07 07:56:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:54,354 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2021-11-07 07:56:54,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 07:56:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2021-11-07 07:56:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 07:56:54,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:54,356 INFO L513 BasicCegarLoop]: trace histogram [81, 61, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:54,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:54,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-07 07:56:54,583 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 207732908, now seen corresponding path program 60 times [2021-11-07 07:56:54,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:54,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450152384] [2021-11-07 07:56:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2418 proven. 3782 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-07 07:56:56,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:56,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450152384] [2021-11-07 07:56:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450152384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:56,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728210947] [2021-11-07 07:56:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:56,002 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:56:57,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-11-07 07:56:57,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:56:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 2779 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2021-11-07 07:56:58,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728210947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:58,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:58,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 25] total 87 [2021-11-07 07:56:58,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439851431] [2021-11-07 07:56:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:56:58,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:56:58,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=5209, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:56:58,733 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 87 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 07:57:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:00,572 INFO L93 Difference]: Finished difference Result 221 states and 264 transitions. [2021-11-07 07:57:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-07 07:57:00,572 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 87 states have internal predecessors, (177), 0 states have call successors, (0), 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 168 [2021-11-07 07:57:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:00,573 INFO L225 Difference]: With dead ends: 221 [2021-11-07 07:57:00,573 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 07:57:00,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7548, Invalid=14802, Unknown=0, NotChecked=0, Total=22350 [2021-11-07 07:57:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 07:57:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2021-11-07 07:57:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.127906976744186) internal successors, (194), 172 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 07:57:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2021-11-07 07:57:00,584 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 168 [2021-11-07 07:57:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:00,585 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2021-11-07 07:57:00,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 87 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 07:57:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2021-11-07 07:57:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 07:57:00,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:00,586 INFO L513 BasicCegarLoop]: trace histogram [83, 62, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:00,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:00,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:00,811 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1418784180, now seen corresponding path program 61 times [2021-11-07 07:57:00,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:00,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090662404] [2021-11-07 07:57:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 2583 proven. 3906 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:57:02,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090662404] [2021-11-07 07:57:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090662404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:02,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452359089] [2021-11-07 07:57:02,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:02,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:02,309 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:02,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:57:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:57:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 2583 proven. 3906 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:57:04,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452359089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:04,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:04,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-07 07:57:04,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603859433] [2021-11-07 07:57:04,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:57:04,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:57:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:57:04,343 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:04,531 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-11-07 07:57:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:57:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-07 07:57:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:04,532 INFO L225 Difference]: With dead ends: 220 [2021-11-07 07:57:04,533 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 07:57:04,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:57:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 07:57:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-11-07 07:57:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 174 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 07:57:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2021-11-07 07:57:04,544 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 172 [2021-11-07 07:57:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:04,544 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2021-11-07 07:57:04,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2021-11-07 07:57:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 07:57:04,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:04,546 INFO L513 BasicCegarLoop]: trace histogram [84, 63, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:04,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:04,756 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1942724969, now seen corresponding path program 62 times [2021-11-07 07:57:04,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:04,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582213394] [2021-11-07 07:57:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:04,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2624 proven. 4032 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:57:06,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:06,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582213394] [2021-11-07 07:57:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582213394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:06,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118982437] [2021-11-07 07:57:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:06,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:06,243 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:06,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:57:07,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 07:57:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2624 proven. 4032 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:57:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118982437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:08,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:08,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-07 07:57:08,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691295492] [2021-11-07 07:57:08,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 07:57:08,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 07:57:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:57:08,341 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 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 07:57:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:08,483 INFO L93 Difference]: Finished difference Result 222 states and 264 transitions. [2021-11-07 07:57:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:57:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 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 174 [2021-11-07 07:57:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:08,484 INFO L225 Difference]: With dead ends: 222 [2021-11-07 07:57:08,484 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 07:57:08,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:57:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 07:57:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 07:57:08,496 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 07:57:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2021-11-07 07:57:08,497 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 174 [2021-11-07 07:57:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:08,497 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2021-11-07 07:57:08,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 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 07:57:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2021-11-07 07:57:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 07:57:08,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:08,499 INFO L513 BasicCegarLoop]: trace histogram [85, 64, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:08,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 07:57:08,713 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1757356730, now seen corresponding path program 63 times [2021-11-07 07:57:08,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:08,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45509793] [2021-11-07 07:57:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:08,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2665 proven. 4160 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-07 07:57:10,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:10,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45509793] [2021-11-07 07:57:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45509793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:10,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617908498] [2021-11-07 07:57:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:10,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:10,285 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:10,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:57:12,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-07 07:57:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:57:12,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 3065 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-11-07 07:57:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617908498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:13,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:13,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 26] total 91 [2021-11-07 07:57:13,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497143858] [2021-11-07 07:57:13,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 07:57:13,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 07:57:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2491, Invalid=5699, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:57:13,329 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:57:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:15,349 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2021-11-07 07:57:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-07 07:57:15,350 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 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 176 [2021-11-07 07:57:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:15,351 INFO L225 Difference]: With dead ends: 231 [2021-11-07 07:57:15,351 INFO L226 Difference]: Without dead ends: 184 [2021-11-07 07:57:15,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8281, Invalid=16211, Unknown=0, NotChecked=0, Total=24492 [2021-11-07 07:57:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-07 07:57:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2021-11-07 07:57:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 180 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 07:57:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2021-11-07 07:57:15,359 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 176 [2021-11-07 07:57:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:15,359 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2021-11-07 07:57:15,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:57:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2021-11-07 07:57:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 07:57:15,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:15,360 INFO L513 BasicCegarLoop]: trace histogram [87, 65, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:15,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-07 07:57:15,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-07 07:57:15,561 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1944866494, now seen corresponding path program 64 times [2021-11-07 07:57:15,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:15,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632125155] [2021-11-07 07:57:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:15,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 2838 proven. 4290 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:57:17,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:17,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632125155] [2021-11-07 07:57:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632125155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:17,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70946471] [2021-11-07 07:57:17,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:17,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:17,140 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:17,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:57:18,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 07:57:18,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 2838 proven. 4290 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:57:19,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70946471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:19,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:19,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-07 07:57:19,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734239545] [2021-11-07 07:57:19,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:57:19,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:57:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:57:19,360 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 07:57:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:19,503 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2021-11-07 07:57:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:57:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 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 180 [2021-11-07 07:57:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:19,505 INFO L225 Difference]: With dead ends: 230 [2021-11-07 07:57:19,505 INFO L226 Difference]: Without dead ends: 183 [2021-11-07 07:57:19,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:57:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-07 07:57:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-11-07 07:57:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 182 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2021-11-07 07:57:19,513 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 180 [2021-11-07 07:57:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:19,514 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2021-11-07 07:57:19,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 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 07:57:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2021-11-07 07:57:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 07:57:19,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:19,515 INFO L513 BasicCegarLoop]: trace histogram [88, 66, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:19,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 07:57:19,719 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -638218459, now seen corresponding path program 65 times [2021-11-07 07:57:19,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:19,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009716098] [2021-11-07 07:57:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:19,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2881 proven. 4422 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:57:21,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:21,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009716098] [2021-11-07 07:57:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009716098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:21,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927232709] [2021-11-07 07:57:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:21,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:21,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:21,423 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:21,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:57:23,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-11-07 07:57:23,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:57:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2881 proven. 4422 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:57:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927232709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:23,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:23,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-07 07:57:23,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425146278] [2021-11-07 07:57:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 07:57:23,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 07:57:23,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:57:23,692 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 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 07:57:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:23,827 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2021-11-07 07:57:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:57:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 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 182 [2021-11-07 07:57:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:23,829 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:57:23,829 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 07:57:23,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:57:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 07:57:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-07 07:57:23,848 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 07:57:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2021-11-07 07:57:23,849 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 182 [2021-11-07 07:57:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2021-11-07 07:57:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 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 07:57:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2021-11-07 07:57:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 07:57:23,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:23,850 INFO L513 BasicCegarLoop]: trace histogram [89, 67, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:23,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:24,051 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 920092744, now seen corresponding path program 66 times [2021-11-07 07:57:24,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:24,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821187045] [2021-11-07 07:57:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2924 proven. 4556 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 07:57:25,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:25,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821187045] [2021-11-07 07:57:25,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821187045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:25,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425353546] [2021-11-07 07:57:25,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:57:25,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:25,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:25,718 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:57:27,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-11-07 07:57:27,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:57:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 3365 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-11-07 07:57:29,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425353546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:29,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:29,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 27] total 95 [2021-11-07 07:57:29,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097177077] [2021-11-07 07:57:29,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:57:29,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:57:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2719, Invalid=6211, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:57:29,029 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 95 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 07:57:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:31,276 INFO L93 Difference]: Finished difference Result 241 states and 288 transitions. [2021-11-07 07:57:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 07:57:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 95 states have internal predecessors, (193), 0 states have call successors, (0), 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 184 [2021-11-07 07:57:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:31,277 INFO L225 Difference]: With dead ends: 241 [2021-11-07 07:57:31,277 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 07:57:31,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9048, Invalid=17684, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 07:57:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 07:57:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2021-11-07 07:57:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.127659574468085) internal successors, (212), 188 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 07:57:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2021-11-07 07:57:31,287 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 184 [2021-11-07 07:57:31,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2021-11-07 07:57:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.031578947368421) internal successors, (193), 95 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 07:57:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2021-11-07 07:57:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 07:57:31,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:31,290 INFO L513 BasicCegarLoop]: trace histogram [91, 68, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:31,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:31,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:31,511 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 746819664, now seen corresponding path program 67 times [2021-11-07 07:57:31,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:31,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038356124] [2021-11-07 07:57:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:31,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 3105 proven. 4692 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:57:33,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038356124] [2021-11-07 07:57:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038356124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603402916] [2021-11-07 07:57:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:33,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:33,236 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:33,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:57:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:57:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 3105 proven. 4692 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:57:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603402916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:35,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:35,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-07 07:57:35,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957032961] [2021-11-07 07:57:35,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 07:57:35,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 07:57:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:57:35,720 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:35,862 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2021-11-07 07:57:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:57:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 07:57:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:35,863 INFO L225 Difference]: With dead ends: 240 [2021-11-07 07:57:35,863 INFO L226 Difference]: Without dead ends: 191 [2021-11-07 07:57:35,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:57:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-07 07:57:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-07 07:57:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1263157894736842) internal successors, (214), 190 states have internal predecessors, (214), 0 states have call successors, (0), 0 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 07:57:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2021-11-07 07:57:35,871 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 188 [2021-11-07 07:57:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:35,871 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2021-11-07 07:57:35,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 72 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2021-11-07 07:57:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 07:57:35,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:35,874 INFO L513 BasicCegarLoop]: trace histogram [92, 69, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:35,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-07 07:57:36,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:36,083 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1780032717, now seen corresponding path program 68 times [2021-11-07 07:57:36,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:36,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286893331] [2021-11-07 07:57:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:36,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3150 proven. 4830 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:57:37,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:37,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286893331] [2021-11-07 07:57:37,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286893331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:37,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111661858] [2021-11-07 07:57:37,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:37,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:37,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:37,884 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:37,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:57:39,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-07 07:57:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3150 proven. 4830 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:57:40,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111661858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:40,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-07 07:57:40,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816031753] [2021-11-07 07:57:40,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 07:57:40,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 07:57:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:57:40,366 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 73 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 07:57:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:40,517 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2021-11-07 07:57:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:57:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 73 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 190 [2021-11-07 07:57:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:40,519 INFO L225 Difference]: With dead ends: 242 [2021-11-07 07:57:40,519 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 07:57:40,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:57:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 07:57:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-07 07:57:40,529 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 07:57:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2021-11-07 07:57:40,530 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 190 [2021-11-07 07:57:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:40,531 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2021-11-07 07:57:40,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 73 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 07:57:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2021-11-07 07:57:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 07:57:40,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:40,533 INFO L513 BasicCegarLoop]: trace histogram [93, 70, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:40,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:57:40,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:40,748 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash 866318678, now seen corresponding path program 69 times [2021-11-07 07:57:40,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:40,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447532871] [2021-11-07 07:57:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:40,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3195 proven. 4970 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 07:57:42,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:42,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447532871] [2021-11-07 07:57:42,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447532871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:42,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519851404] [2021-11-07 07:57:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:42,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:42,603 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:42,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:57:44,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-07 07:57:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:57:44,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 3679 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-11-07 07:57:45,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519851404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:45,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:45,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 28] total 99 [2021-11-07 07:57:45,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882568414] [2021-11-07 07:57:45,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:57:45,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:57:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2957, Invalid=6745, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:57:45,973 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 07:57:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:48,342 INFO L93 Difference]: Finished difference Result 251 states and 300 transitions. [2021-11-07 07:57:48,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 07:57:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 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 192 [2021-11-07 07:57:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:48,344 INFO L225 Difference]: With dead ends: 251 [2021-11-07 07:57:48,344 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 07:57:48,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4423 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9849, Invalid=19221, Unknown=0, NotChecked=0, Total=29070 [2021-11-07 07:57:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 07:57:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2021-11-07 07:57:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1275510204081634) internal successors, (221), 196 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 07:57:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2021-11-07 07:57:48,357 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 192 [2021-11-07 07:57:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:48,358 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2021-11-07 07:57:48,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0303030303030303) internal successors, (201), 99 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 07:57:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2021-11-07 07:57:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 07:57:48,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:48,359 INFO L513 BasicCegarLoop]: trace histogram [95, 71, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:48,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:48,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:48,575 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash -498029858, now seen corresponding path program 70 times [2021-11-07 07:57:48,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:48,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894442295] [2021-11-07 07:57:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:48,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 3384 proven. 5112 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:57:50,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:50,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894442295] [2021-11-07 07:57:50,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894442295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:50,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223798067] [2021-11-07 07:57:50,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:50,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:50,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:50,461 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:50,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:57:52,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:57:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 3384 proven. 5112 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:57:53,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223798067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:53,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:53,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-07 07:57:53,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251648836] [2021-11-07 07:57:53,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:57:53,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:57:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:57:53,041 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 07:57:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:53,208 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2021-11-07 07:57:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:57:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 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 196 [2021-11-07 07:57:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:53,210 INFO L225 Difference]: With dead ends: 250 [2021-11-07 07:57:53,210 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 07:57:53,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:57:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 07:57:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-07 07:57:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1262626262626263) internal successors, (223), 198 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 07:57:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2021-11-07 07:57:53,220 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 196 [2021-11-07 07:57:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:53,221 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2021-11-07 07:57:53,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 07:57:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2021-11-07 07:57:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-07 07:57:53,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:53,223 INFO L513 BasicCegarLoop]: trace histogram [96, 72, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:53,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-07 07:57:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:53,431 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2037932737, now seen corresponding path program 71 times [2021-11-07 07:57:53,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:53,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541367622] [2021-11-07 07:57:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:53,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3431 proven. 5256 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:57:55,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:55,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541367622] [2021-11-07 07:57:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541367622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:55,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545234199] [2021-11-07 07:57:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:55,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:55,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:55,369 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:55,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:57:57,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2021-11-07 07:57:57,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 07:57:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3431 proven. 5256 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:57:58,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545234199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:58,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:58,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-07 07:57:58,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353727847] [2021-11-07 07:57:58,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 07:57:58,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 07:57:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:57:58,076 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 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 07:57:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:58,239 INFO L93 Difference]: Finished difference Result 252 states and 300 transitions. [2021-11-07 07:57:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 07:57:58,239 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 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 198 [2021-11-07 07:57:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:58,241 INFO L225 Difference]: With dead ends: 252 [2021-11-07 07:57:58,241 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 07:57:58,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:57:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 07:57:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-07 07:57:58,253 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 07:57:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-11-07 07:57:58,254 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 198 [2021-11-07 07:57:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:58,254 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-11-07 07:57:58,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 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 07:57:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-11-07 07:57:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-07 07:57:58,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:58,256 INFO L513 BasicCegarLoop]: trace histogram [97, 73, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:58,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-07 07:57:58,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:58,475 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash -443437596, now seen corresponding path program 72 times [2021-11-07 07:57:58,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:58,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046170107] [2021-11-07 07:57:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:58,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3478 proven. 5402 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 07:58:00,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:00,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046170107] [2021-11-07 07:58:00,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046170107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:00,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210537303] [2021-11-07 07:58:00,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:00,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:00,446 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:00,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:58:02,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-11-07 07:58:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:58:02,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 4007 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2021-11-07 07:58:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210537303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:04,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 29] total 103 [2021-11-07 07:58:04,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880153039] [2021-11-07 07:58:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 07:58:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 07:58:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3205, Invalid=7301, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:58:04,181 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 07:58:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:06,776 INFO L93 Difference]: Finished difference Result 261 states and 312 transitions. [2021-11-07 07:58:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:58:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 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 200 [2021-11-07 07:58:06,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:06,778 INFO L225 Difference]: With dead ends: 261 [2021-11-07 07:58:06,778 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 07:58:06,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4795 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10684, Invalid=20822, Unknown=0, NotChecked=0, Total=31506 [2021-11-07 07:58:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 07:58:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 205. [2021-11-07 07:58:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1274509803921569) internal successors, (230), 204 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 07:58:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 230 transitions. [2021-11-07 07:58:06,788 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 230 transitions. Word has length 200 [2021-11-07 07:58:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:06,789 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 230 transitions. [2021-11-07 07:58:06,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 07:58:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 230 transitions. [2021-11-07 07:58:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-07 07:58:06,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:06,791 INFO L513 BasicCegarLoop]: trace histogram [99, 74, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:06,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:07,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-07 07:58:07,019 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1520230164, now seen corresponding path program 73 times [2021-11-07 07:58:07,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:07,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319791299] [2021-11-07 07:58:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 3675 proven. 5550 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:58:09,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:09,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319791299] [2021-11-07 07:58:09,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319791299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:09,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618921652] [2021-11-07 07:58:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:58:09,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:09,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:09,301 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:09,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:58:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:58:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 3675 proven. 5550 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:58:12,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618921652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:12,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-07 07:58:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085072502] [2021-11-07 07:58:12,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:58:12,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:58:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:58:12,102 INFO L87 Difference]: Start difference. First operand 205 states and 230 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:12,300 INFO L93 Difference]: Finished difference Result 260 states and 310 transitions. [2021-11-07 07:58:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 07:58:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-07 07:58:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:12,302 INFO L225 Difference]: With dead ends: 260 [2021-11-07 07:58:12,302 INFO L226 Difference]: Without dead ends: 207 [2021-11-07 07:58:12,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:58:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-07 07:58:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-11-07 07:58:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1262135922330097) internal successors, (232), 206 states have internal predecessors, (232), 0 states have call successors, (0), 0 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 07:58:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 232 transitions. [2021-11-07 07:58:12,315 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 232 transitions. Word has length 204 [2021-11-07 07:58:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 232 transitions. [2021-11-07 07:58:12,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 232 transitions. [2021-11-07 07:58:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-07 07:58:12,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:12,318 INFO L513 BasicCegarLoop]: trace histogram [100, 75, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:12,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:12,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:12,531 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1986902577, now seen corresponding path program 74 times [2021-11-07 07:58:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:12,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37681153] [2021-11-07 07:58:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3724 proven. 5700 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:58:14,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37681153] [2021-11-07 07:58:14,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37681153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800139583] [2021-11-07 07:58:14,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:58:14,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:14,689 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:14,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:58:17,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:58:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-07 07:58:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3724 proven. 5700 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:58:17,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800139583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:17,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:17,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-07 07:58:17,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209321520] [2021-11-07 07:58:17,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:58:17,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:58:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:58:17,606 INFO L87 Difference]: Start difference. First operand 207 states and 232 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 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 07:58:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:17,783 INFO L93 Difference]: Finished difference Result 262 states and 312 transitions. [2021-11-07 07:58:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:58:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 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 206 [2021-11-07 07:58:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:17,785 INFO L225 Difference]: With dead ends: 262 [2021-11-07 07:58:17,785 INFO L226 Difference]: Without dead ends: 209 [2021-11-07 07:58:17,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:58:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-07 07:58:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-07 07:58:17,799 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 07:58:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2021-11-07 07:58:17,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 206 [2021-11-07 07:58:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:17,800 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2021-11-07 07:58:17,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 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 07:58:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2021-11-07 07:58:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 07:58:17,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:17,802 INFO L513 BasicCegarLoop]: trace histogram [101, 76, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:17,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-07 07:58:18,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:18,026 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash 512474610, now seen corresponding path program 75 times [2021-11-07 07:58:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:18,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894580646] [2021-11-07 07:58:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:18,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3773 proven. 5852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-07 07:58:20,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894580646] [2021-11-07 07:58:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894580646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:20,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268220607] [2021-11-07 07:58:20,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:58:20,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:20,151 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:20,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:58:22,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-11-07 07:58:22,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:58:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 4349 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2021-11-07 07:58:24,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268220607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:24,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:24,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 30] total 107 [2021-11-07 07:58:24,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546694661] [2021-11-07 07:58:24,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:58:24,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:58:24,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3463, Invalid=7879, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:58:24,075 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 107 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 07:58:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:26,815 INFO L93 Difference]: Finished difference Result 271 states and 324 transitions. [2021-11-07 07:58:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 07:58:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 107 states have internal predecessors, (217), 0 states have call successors, (0), 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 208 [2021-11-07 07:58:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:26,817 INFO L225 Difference]: With dead ends: 271 [2021-11-07 07:58:26,817 INFO L226 Difference]: Without dead ends: 216 [2021-11-07 07:58:26,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11553, Invalid=22487, Unknown=0, NotChecked=0, Total=34040 [2021-11-07 07:58:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-07 07:58:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-11-07 07:58:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1273584905660377) internal successors, (239), 212 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 07:58:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 239 transitions. [2021-11-07 07:58:26,827 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 239 transitions. Word has length 208 [2021-11-07 07:58:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 239 transitions. [2021-11-07 07:58:26,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.02803738317757) internal successors, (217), 107 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 07:58:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 239 transitions. [2021-11-07 07:58:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 07:58:26,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:26,829 INFO L513 BasicCegarLoop]: trace histogram [103, 77, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:26,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-07 07:58:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-07 07:58:27,029 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1155853702, now seen corresponding path program 76 times [2021-11-07 07:58:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:27,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003441892] [2021-11-07 07:58:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:27,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 3978 proven. 6006 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:58:29,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003441892] [2021-11-07 07:58:29,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003441892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164621073] [2021-11-07 07:58:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:58:29,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:29,151 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:29,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:58:31,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:58:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 07:58:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 3978 proven. 6006 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:58:32,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164621073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:32,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:32,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-07 07:58:32,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038413203] [2021-11-07 07:58:32,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:58:32,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:58:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:58:32,101 INFO L87 Difference]: Start difference. First operand 213 states and 239 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 07:58:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:32,261 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-11-07 07:58:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:58:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 0 states have call successors, (0), 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 212 [2021-11-07 07:58:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:32,262 INFO L225 Difference]: With dead ends: 270 [2021-11-07 07:58:32,263 INFO L226 Difference]: Without dead ends: 215 [2021-11-07 07:58:32,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:58:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-07 07:58:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-07 07:58:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.1261682242990654) internal successors, (241), 214 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 07:58:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 241 transitions. [2021-11-07 07:58:32,273 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 241 transitions. Word has length 212 [2021-11-07 07:58:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 241 transitions. [2021-11-07 07:58:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 07:58:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 241 transitions. [2021-11-07 07:58:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 07:58:32,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:32,276 INFO L513 BasicCegarLoop]: trace histogram [104, 78, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:32,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:32,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 07:58:32,491 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash 412394589, now seen corresponding path program 77 times [2021-11-07 07:58:32,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:32,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889809811] [2021-11-07 07:58:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:32,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4029 proven. 6162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:58:34,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:34,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889809811] [2021-11-07 07:58:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889809811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:34,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877661066] [2021-11-07 07:58:34,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:34,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:34,703 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:34,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:58:37,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 105 check-sat command(s) [2021-11-07 07:58:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:58:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4029 proven. 6162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:58:37,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877661066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:37,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:37,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-07 07:58:37,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782248960] [2021-11-07 07:58:37,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 07:58:37,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 07:58:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:58:37,794 INFO L87 Difference]: Start difference. First operand 215 states and 241 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 07:58:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:37,974 INFO L93 Difference]: Finished difference Result 272 states and 324 transitions. [2021-11-07 07:58:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 07:58:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 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 214 [2021-11-07 07:58:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:37,975 INFO L225 Difference]: With dead ends: 272 [2021-11-07 07:58:37,976 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 07:58:37,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:58:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 07:58:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-07 07:58:37,986 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 07:58:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-11-07 07:58:37,987 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 214 [2021-11-07 07:58:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:37,987 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-11-07 07:58:37,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 07:58:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-11-07 07:58:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 07:58:37,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:37,989 INFO L513 BasicCegarLoop]: trace histogram [105, 79, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:38,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:38,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:38,190 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash -34518656, now seen corresponding path program 78 times [2021-11-07 07:58:38,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:38,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627196721] [2021-11-07 07:58:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:38,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 4080 proven. 6320 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-11-07 07:58:40,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:40,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627196721] [2021-11-07 07:58:40,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627196721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:40,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045140429] [2021-11-07 07:58:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:40,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:40,447 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:40,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 07:58:43,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-11-07 07:58:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:58:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 4705 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-11-07 07:58:44,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045140429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:44,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:44,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 31] total 111 [2021-11-07 07:58:44,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501846904] [2021-11-07 07:58:44,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 07:58:44,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 07:58:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3731, Invalid=8479, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:58:44,877 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 111 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 07:58:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:47,958 INFO L93 Difference]: Finished difference Result 281 states and 336 transitions. [2021-11-07 07:58:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-07 07:58:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 111 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) Word has length 216 [2021-11-07 07:58:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:47,959 INFO L225 Difference]: With dead ends: 281 [2021-11-07 07:58:47,959 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 07:58:47,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5584 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12456, Invalid=24216, Unknown=0, NotChecked=0, Total=36672 [2021-11-07 07:58:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 07:58:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2021-11-07 07:58:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1272727272727272) internal successors, (248), 220 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 07:58:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 248 transitions. [2021-11-07 07:58:47,980 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 248 transitions. Word has length 216 [2021-11-07 07:58:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:47,980 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 248 transitions. [2021-11-07 07:58:47,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.027027027027027) internal successors, (225), 111 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 07:58:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 248 transitions. [2021-11-07 07:58:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-07 07:58:47,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:47,982 INFO L513 BasicCegarLoop]: trace histogram [107, 80, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:48,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:48,200 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash 944807816, now seen corresponding path program 79 times [2021-11-07 07:58:48,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:48,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031606752] [2021-11-07 07:58:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:48,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 4293 proven. 6480 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:58:50,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:50,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031606752] [2021-11-07 07:58:50,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031606752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:50,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155259315] [2021-11-07 07:58:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:58:50,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:50,521 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:50,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 07:58:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:58:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 4293 proven. 6480 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:58:53,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155259315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:53,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:53,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-07 07:58:53,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206459982] [2021-11-07 07:58:53,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 07:58:53,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 07:58:53,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:58:53,809 INFO L87 Difference]: Start difference. First operand 221 states and 248 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:54,018 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2021-11-07 07:58:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:58:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-07 07:58:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:54,021 INFO L225 Difference]: With dead ends: 280 [2021-11-07 07:58:54,021 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 07:58:54,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:58:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 07:58:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-11-07 07:58:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1261261261261262) internal successors, (250), 222 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 07:58:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 250 transitions. [2021-11-07 07:58:54,038 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 250 transitions. Word has length 220 [2021-11-07 07:58:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:54,039 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 250 transitions. [2021-11-07 07:58:54,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 250 transitions. [2021-11-07 07:58:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-07 07:58:54,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:54,041 INFO L513 BasicCegarLoop]: trace histogram [108, 81, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:54,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:54,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:54,255 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1213701739, now seen corresponding path program 80 times [2021-11-07 07:58:54,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:54,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090658690] [2021-11-07 07:58:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:54,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4346 proven. 6642 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:58:56,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:56,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090658690] [2021-11-07 07:58:56,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090658690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:56,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872981559] [2021-11-07 07:58:56,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:58:56,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:56,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:56,746 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:56,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 07:58:59,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:58:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:59,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-07 07:58:59,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4346 proven. 6642 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:58:59,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872981559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:59,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:59,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-07 07:58:59,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183497148] [2021-11-07 07:58:59,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 07:58:59,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 07:59:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:59:00,001 INFO L87 Difference]: Start difference. First operand 223 states and 250 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 07:59:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:00,193 INFO L93 Difference]: Finished difference Result 282 states and 336 transitions. [2021-11-07 07:59:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 07:59:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 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 222 [2021-11-07 07:59:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:00,194 INFO L225 Difference]: With dead ends: 282 [2021-11-07 07:59:00,195 INFO L226 Difference]: Without dead ends: 225 [2021-11-07 07:59:00,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:59:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-07 07:59:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-07 07:59:00,204 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 07:59:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2021-11-07 07:59:00,204 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 222 [2021-11-07 07:59:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:00,204 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2021-11-07 07:59:00,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 85 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 07:59:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2021-11-07 07:59:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 07:59:00,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:00,205 INFO L513 BasicCegarLoop]: trace histogram [109, 82, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:00,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-07 07:59:00,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:00,406 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1922723982, now seen corresponding path program 81 times [2021-11-07 07:59:00,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:00,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428267687] [2021-11-07 07:59:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:00,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4399 proven. 6806 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 07:59:02,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:02,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428267687] [2021-11-07 07:59:02,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428267687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:02,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16706791] [2021-11-07 07:59:02,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:59:02,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:02,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:02,860 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:02,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 07:59:05,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-07 07:59:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:05,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:59:05,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-11-07 07:59:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16706791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:07,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 32] total 115 [2021-11-07 07:59:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688904894] [2021-11-07 07:59:07,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 07:59:07,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 07:59:07,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=9101, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 07:59:07,400 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 115 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 07:59:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:10,638 INFO L93 Difference]: Finished difference Result 291 states and 348 transitions. [2021-11-07 07:59:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 07:59:10,638 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 115 states have internal predecessors, (233), 0 states have call successors, (0), 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 224 [2021-11-07 07:59:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:10,639 INFO L225 Difference]: With dead ends: 291 [2021-11-07 07:59:10,639 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 07:59:10,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6001 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13393, Invalid=26009, Unknown=0, NotChecked=0, Total=39402 [2021-11-07 07:59:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 07:59:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2021-11-07 07:59:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.1271929824561404) internal successors, (257), 228 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 07:59:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 257 transitions. [2021-11-07 07:59:10,651 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 257 transitions. Word has length 224 [2021-11-07 07:59:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:10,651 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 257 transitions. [2021-11-07 07:59:10,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.026086956521739) internal successors, (233), 115 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 07:59:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 257 transitions. [2021-11-07 07:59:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-07 07:59:10,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:10,653 INFO L513 BasicCegarLoop]: trace histogram [111, 83, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:10,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:10,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-07 07:59:10,867 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 55830550, now seen corresponding path program 82 times [2021-11-07 07:59:10,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:10,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205876804] [2021-11-07 07:59:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:10,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 4620 proven. 6972 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:59:13,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:13,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205876804] [2021-11-07 07:59:13,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205876804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:13,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50318391] [2021-11-07 07:59:13,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:59:13,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:13,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:13,344 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:13,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-07 07:59:16,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:59:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-07 07:59:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 4620 proven. 6972 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:59:16,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50318391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:16,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:16,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-07 07:59:16,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667838349] [2021-11-07 07:59:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:59:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:59:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:59:16,723 INFO L87 Difference]: Start difference. First operand 229 states and 257 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 07:59:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:16,920 INFO L93 Difference]: Finished difference Result 290 states and 346 transitions. [2021-11-07 07:59:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:59:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 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 228 [2021-11-07 07:59:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:16,922 INFO L225 Difference]: With dead ends: 290 [2021-11-07 07:59:16,922 INFO L226 Difference]: Without dead ends: 231 [2021-11-07 07:59:16,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:59:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-07 07:59:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-07 07:59:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.126086956521739) internal successors, (259), 230 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 07:59:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 259 transitions. [2021-11-07 07:59:16,932 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 259 transitions. Word has length 228 [2021-11-07 07:59:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:16,933 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 259 transitions. [2021-11-07 07:59:16,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 07:59:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 259 transitions. [2021-11-07 07:59:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-07 07:59:16,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:16,935 INFO L513 BasicCegarLoop]: trace histogram [112, 84, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:16,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:17,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:17,150 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 204166137, now seen corresponding path program 83 times [2021-11-07 07:59:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:17,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179849528] [2021-11-07 07:59:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:17,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4675 proven. 7140 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:59:19,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:19,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179849528] [2021-11-07 07:59:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179849528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:19,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779580866] [2021-11-07 07:59:19,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:59:19,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:19,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:19,698 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:19,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-07 07:59:22,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 113 check-sat command(s) [2021-11-07 07:59:22,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-07 07:59:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4675 proven. 7140 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:59:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779580866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:23,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:23,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-07 07:59:23,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578643403] [2021-11-07 07:59:23,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-07 07:59:23,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-07 07:59:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:59:23,183 INFO L87 Difference]: Start difference. First operand 231 states and 259 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 88 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 07:59:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:23,379 INFO L93 Difference]: Finished difference Result 292 states and 348 transitions. [2021-11-07 07:59:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-07 07:59:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 88 states have internal predecessors, (181), 0 states have call successors, (0), 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 230 [2021-11-07 07:59:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:23,381 INFO L225 Difference]: With dead ends: 292 [2021-11-07 07:59:23,381 INFO L226 Difference]: Without dead ends: 233 [2021-11-07 07:59:23,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:59:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-07 07:59:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-07 07:59:23,396 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 07:59:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2021-11-07 07:59:23,397 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 230 [2021-11-07 07:59:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:23,397 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2021-11-07 07:59:23,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 88 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 07:59:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2021-11-07 07:59:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 07:59:23,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:23,399 INFO L513 BasicCegarLoop]: trace histogram [113, 85, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:23,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:23,607 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1020744476, now seen corresponding path program 84 times [2021-11-07 07:59:23,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:23,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175648802] [2021-11-07 07:59:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:23,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 4730 proven. 7310 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 07:59:26,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:26,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175648802] [2021-11-07 07:59:26,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175648802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:26,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790011148] [2021-11-07 07:59:26,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:59:26,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:26,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:26,244 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 07:59:29,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2021-11-07 07:59:29,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:59:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 5459 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-11-07 07:59:31,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790011148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:31,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:31,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 33] total 119 [2021-11-07 07:59:31,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375236504] [2021-11-07 07:59:31,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 07:59:31,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 07:59:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4297, Invalid=9745, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:59:31,081 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 07:59:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:34,531 INFO L93 Difference]: Finished difference Result 301 states and 360 transitions. [2021-11-07 07:59:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-07 07:59:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 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 232 [2021-11-07 07:59:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:34,533 INFO L225 Difference]: With dead ends: 301 [2021-11-07 07:59:34,533 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 07:59:34,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6433 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=14364, Invalid=27866, Unknown=0, NotChecked=0, Total=42230 [2021-11-07 07:59:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 07:59:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-11-07 07:59:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1271186440677967) internal successors, (266), 236 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 07:59:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 266 transitions. [2021-11-07 07:59:34,547 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 266 transitions. Word has length 232 [2021-11-07 07:59:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:34,547 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 266 transitions. [2021-11-07 07:59:34,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0252100840336134) internal successors, (241), 119 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 07:59:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 266 transitions. [2021-11-07 07:59:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-07 07:59:34,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:34,549 INFO L513 BasicCegarLoop]: trace histogram [115, 86, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:34,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-07 07:59:34,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-07 07:59:34,763 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1441598500, now seen corresponding path program 85 times [2021-11-07 07:59:34,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:34,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863253104] [2021-11-07 07:59:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:34,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 4959 proven. 7482 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:59:37,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:37,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863253104] [2021-11-07 07:59:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863253104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:37,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701747768] [2021-11-07 07:59:37,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:59:37,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:37,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:37,379 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:37,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-07 07:59:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:59:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 4959 proven. 7482 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:59:40,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701747768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:40,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:40,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-07 07:59:40,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303912635] [2021-11-07 07:59:40,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:59:40,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:59:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:59:40,924 INFO L87 Difference]: Start difference. First operand 237 states and 266 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:59:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:41,125 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2021-11-07 07:59:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 07:59:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 0 states have call successors, (0), 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 236 [2021-11-07 07:59:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:41,126 INFO L225 Difference]: With dead ends: 300 [2021-11-07 07:59:41,126 INFO L226 Difference]: Without dead ends: 239 [2021-11-07 07:59:41,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:59:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-07 07:59:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-11-07 07:59:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1260504201680672) internal successors, (268), 238 states have internal predecessors, (268), 0 states have call successors, (0), 0 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 07:59:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2021-11-07 07:59:41,138 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 236 [2021-11-07 07:59:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:41,138 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2021-11-07 07:59:41,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 90 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 07:59:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2021-11-07 07:59:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 07:59:41,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:41,139 INFO L513 BasicCegarLoop]: trace histogram [116, 87, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:41,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:41,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-07 07:59:41,343 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1428691705, now seen corresponding path program 86 times [2021-11-07 07:59:41,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:41,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796122926] [2021-11-07 07:59:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:41,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 5016 proven. 7656 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:59:44,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:44,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796122926] [2021-11-07 07:59:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796122926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:44,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310472189] [2021-11-07 07:59:44,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:59:44,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:44,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:44,017 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:44,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-07 07:59:47,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:59:47,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:47,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 07:59:47,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 5016 proven. 7656 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:59:47,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310472189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:47,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:47,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-07 07:59:47,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465065455] [2021-11-07 07:59:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 07:59:47,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 07:59:47,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:59:47,653 INFO L87 Difference]: Start difference. First operand 239 states and 268 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 07:59:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:47,865 INFO L93 Difference]: Finished difference Result 302 states and 360 transitions. [2021-11-07 07:59:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 07:59:47,865 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 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 238 [2021-11-07 07:59:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:47,867 INFO L225 Difference]: With dead ends: 302 [2021-11-07 07:59:47,867 INFO L226 Difference]: Without dead ends: 241 [2021-11-07 07:59:47,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:59:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-07 07:59:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-07 07:59:47,878 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 07:59:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2021-11-07 07:59:47,878 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 238 [2021-11-07 07:59:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:47,879 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2021-11-07 07:59:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 07:59:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2021-11-07 07:59:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 07:59:47,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:47,880 INFO L513 BasicCegarLoop]: trace histogram [117, 88, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:47,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-07 07:59:48,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-07 07:59:48,080 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1886392618, now seen corresponding path program 87 times [2021-11-07 07:59:48,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:48,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119497217] [2021-11-07 07:59:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:48,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 5073 proven. 7832 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-11-07 07:59:50,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:50,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119497217] [2021-11-07 07:59:50,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119497217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:50,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40947997] [2021-11-07 07:59:50,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:59:50,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:50,795 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:50,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 07:59:53,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-11-07 07:59:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:59:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 0 proven. 5857 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2021-11-07 07:59:55,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40947997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:55,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:55,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 34] total 123 [2021-11-07 07:59:55,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186186378] [2021-11-07 07:59:55,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 07:59:55,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 07:59:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4595, Invalid=10411, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:59:55,816 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 07:59:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:59,536 INFO L93 Difference]: Finished difference Result 311 states and 372 transitions. [2021-11-07 07:59:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-07 07:59:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 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 240 [2021-11-07 07:59:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:59,537 INFO L225 Difference]: With dead ends: 311 [2021-11-07 07:59:59,537 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 07:59:59,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6880 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=15369, Invalid=29787, Unknown=0, NotChecked=0, Total=45156 [2021-11-07 07:59:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 07:59:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2021-11-07 07:59:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.1270491803278688) internal successors, (275), 244 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 07:59:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2021-11-07 07:59:59,557 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 240 [2021-11-07 07:59:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:59,557 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2021-11-07 07:59:59,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 07:59:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2021-11-07 07:59:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-07 07:59:59,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:59,559 INFO L513 BasicCegarLoop]: trace histogram [119, 89, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:59,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:59,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:59,760 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1084478542, now seen corresponding path program 88 times [2021-11-07 07:59:59,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:59,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765092626] [2021-11-07 07:59:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:59,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 5310 proven. 8010 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:00:02,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:02,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765092626] [2021-11-07 08:00:02,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765092626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:02,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219272630] [2021-11-07 08:00:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:00:02,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:02,586 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:02,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-07 08:00:05,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:00:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-07 08:00:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 5310 proven. 8010 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:00:06,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219272630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:06,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:06,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-07 08:00:06,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432831247] [2021-11-07 08:00:06,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 08:00:06,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 08:00:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:00:06,416 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 08:00:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:06,641 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2021-11-07 08:00:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 08:00:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 0 states have call successors, (0), 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 244 [2021-11-07 08:00:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:06,643 INFO L225 Difference]: With dead ends: 310 [2021-11-07 08:00:06,643 INFO L226 Difference]: Without dead ends: 247 [2021-11-07 08:00:06,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:00:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-07 08:00:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-11-07 08:00:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1260162601626016) internal successors, (277), 246 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 08:00:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2021-11-07 08:00:06,665 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 244 [2021-11-07 08:00:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:06,665 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2021-11-07 08:00:06,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 93 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 08:00:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2021-11-07 08:00:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-07 08:00:06,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:06,667 INFO L513 BasicCegarLoop]: trace histogram [120, 90, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:06,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:06,895 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1063423595, now seen corresponding path program 89 times [2021-11-07 08:00:06,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:06,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013721489] [2021-11-07 08:00:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:06,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5369 proven. 8190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:00:09,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:09,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013721489] [2021-11-07 08:00:09,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013721489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:09,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159353660] [2021-11-07 08:00:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:00:09,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:09,876 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:09,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-07 08:00:13,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2021-11-07 08:00:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 08:00:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5369 proven. 8190 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:00:14,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159353660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:14,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:14,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-07 08:00:14,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157643702] [2021-11-07 08:00:14,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 08:00:14,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:14,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 08:00:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:00:14,176 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 94 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 08:00:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:14,414 INFO L93 Difference]: Finished difference Result 312 states and 372 transitions. [2021-11-07 08:00:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-07 08:00:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 94 states have internal predecessors, (193), 0 states have call successors, (0), 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 246 [2021-11-07 08:00:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:14,416 INFO L225 Difference]: With dead ends: 312 [2021-11-07 08:00:14,416 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 08:00:14,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:00:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 08:00:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-07 08:00:14,430 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 08:00:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-11-07 08:00:14,431 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 246 [2021-11-07 08:00:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:14,431 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-11-07 08:00:14,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 94 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 08:00:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-11-07 08:00:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-07 08:00:14,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:14,434 INFO L513 BasicCegarLoop]: trace histogram [121, 91, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:14,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-07 08:00:14,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:14,659 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1990511288, now seen corresponding path program 90 times [2021-11-07 08:00:14,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:14,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505690261] [2021-11-07 08:00:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:14,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 5428 proven. 8372 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:00:18,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505690261] [2021-11-07 08:00:18,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505690261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:18,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299016762] [2021-11-07 08:00:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:00:18,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:18,097 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:18,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 08:00:22,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 119 check-sat command(s) [2021-11-07 08:00:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 08:00:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 6269 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-11-07 08:00:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299016762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:24,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:24,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 35] total 127 [2021-11-07 08:00:24,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147277938] [2021-11-07 08:00:24,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 08:00:24,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 08:00:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4903, Invalid=11099, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:00:24,385 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 08:00:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:28,945 INFO L93 Difference]: Finished difference Result 321 states and 384 transitions. [2021-11-07 08:00:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-07 08:00:28,946 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 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 248 [2021-11-07 08:00:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:28,947 INFO L225 Difference]: With dead ends: 321 [2021-11-07 08:00:28,947 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 08:00:28,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7342 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=16408, Invalid=31772, Unknown=0, NotChecked=0, Total=48180 [2021-11-07 08:00:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 08:00:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2021-11-07 08:00:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.126984126984127) internal successors, (284), 252 states have internal predecessors, (284), 0 states have call successors, (0), 0 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 08:00:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2021-11-07 08:00:28,966 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 248 [2021-11-07 08:00:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:28,966 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2021-11-07 08:00:28,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 08:00:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2021-11-07 08:00:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-07 08:00:28,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:28,967 INFO L513 BasicCegarLoop]: trace histogram [123, 92, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:29,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-07 08:00:29,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:29,168 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1504090432, now seen corresponding path program 91 times [2021-11-07 08:00:29,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:29,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149207622] [2021-11-07 08:00:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:29,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 5673 proven. 8556 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:00:32,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:32,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149207622] [2021-11-07 08:00:32,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149207622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:32,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383971935] [2021-11-07 08:00:32,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:00:32,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:32,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:32,670 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:32,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-07 08:00:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 08:00:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 5673 proven. 8556 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:00:37,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383971935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:37,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:37,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-07 08:00:37,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900444255] [2021-11-07 08:00:37,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 08:00:37,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 08:00:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:00:37,375 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 08:00:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:37,632 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2021-11-07 08:00:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 08:00:37,633 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 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 252 [2021-11-07 08:00:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:37,634 INFO L225 Difference]: With dead ends: 320 [2021-11-07 08:00:37,634 INFO L226 Difference]: Without dead ends: 255 [2021-11-07 08:00:37,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:00:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-07 08:00:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-11-07 08:00:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.125984251968504) internal successors, (286), 254 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 08:00:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2021-11-07 08:00:37,650 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 286 transitions. Word has length 252 [2021-11-07 08:00:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:37,651 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 286 transitions. [2021-11-07 08:00:37,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 96 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 08:00:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 286 transitions. [2021-11-07 08:00:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-07 08:00:37,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:37,652 INFO L513 BasicCegarLoop]: trace histogram [124, 93, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:37,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:37,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:37,853 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1053550173, now seen corresponding path program 92 times [2021-11-07 08:00:37,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:37,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060234964] [2021-11-07 08:00:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:37,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5734 proven. 8742 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:00:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060234964] [2021-11-07 08:00:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060234964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38480544] [2021-11-07 08:00:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:00:41,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:41,580 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-07 08:00:45,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:00:45,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:45,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-07 08:00:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5734 proven. 8742 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:00:46,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38480544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:46,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:46,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-07 08:00:46,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736953160] [2021-11-07 08:00:46,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 08:00:46,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 08:00:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:00:46,342 INFO L87 Difference]: Start difference. First operand 255 states and 286 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 97 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:00:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:46,641 INFO L93 Difference]: Finished difference Result 322 states and 384 transitions. [2021-11-07 08:00:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 08:00:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 97 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2021-11-07 08:00:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:46,643 INFO L225 Difference]: With dead ends: 322 [2021-11-07 08:00:46,643 INFO L226 Difference]: Without dead ends: 257 [2021-11-07 08:00:46,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:00:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-07 08:00:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-11-07 08:00:46,659 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 08:00:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2021-11-07 08:00:46,659 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 254 [2021-11-07 08:00:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:46,660 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2021-11-07 08:00:46,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 97 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:00:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2021-11-07 08:00:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-07 08:00:46,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:46,661 INFO L513 BasicCegarLoop]: trace histogram [125, 94, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:46,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:46,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:46,862 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1876058170, now seen corresponding path program 93 times [2021-11-07 08:00:46,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:46,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086272141] [2021-11-07 08:00:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:46,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 5795 proven. 8930 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:00:50,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:50,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086272141] [2021-11-07 08:00:50,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086272141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:50,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257655097] [2021-11-07 08:00:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:00:50,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:50,543 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-07 08:00:54,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2021-11-07 08:00:54,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:00:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 0 proven. 6695 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2021-11-07 08:00:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257655097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:57,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:57,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 36] total 131 [2021-11-07 08:00:57,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670163323] [2021-11-07 08:00:57,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 08:00:57,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 08:00:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5221, Invalid=11809, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 08:00:57,190 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 131 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 08:01:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:02,017 INFO L93 Difference]: Finished difference Result 331 states and 396 transitions. [2021-11-07 08:01:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-07 08:01:02,017 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 131 states have internal predecessors, (265), 0 states have call successors, (0), 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 256 [2021-11-07 08:01:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:02,019 INFO L225 Difference]: With dead ends: 331 [2021-11-07 08:01:02,019 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 08:01:02,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7819 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=17481, Invalid=33821, Unknown=0, NotChecked=0, Total=51302 [2021-11-07 08:01:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 08:01:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2021-11-07 08:01:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.126923076923077) internal successors, (293), 260 states have internal predecessors, (293), 0 states have call successors, (0), 0 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 08:01:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 293 transitions. [2021-11-07 08:01:02,039 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 293 transitions. Word has length 256 [2021-11-07 08:01:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:02,040 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 293 transitions. [2021-11-07 08:01:02,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0229007633587788) internal successors, (265), 131 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 08:01:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 293 transitions. [2021-11-07 08:01:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-07 08:01:02,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:02,041 INFO L513 BasicCegarLoop]: trace histogram [127, 95, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:02,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:02,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-07 08:01:02,242 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:02,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1259658574, now seen corresponding path program 94 times [2021-11-07 08:01:02,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:02,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388904002] [2021-11-07 08:01:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:02,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 6048 proven. 9120 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:01:05,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:05,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388904002] [2021-11-07 08:01:05,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388904002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:05,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424523143] [2021-11-07 08:01:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:01:05,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:05,409 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:05,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-07 08:01:09,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:01:09,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 08:01:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 6048 proven. 9120 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:01:09,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424523143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:09,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:09,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-07 08:01:09,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21904019] [2021-11-07 08:01:09,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 08:01:09,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 08:01:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:01:09,741 INFO L87 Difference]: Start difference. First operand 261 states and 293 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 08:01:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:09,964 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2021-11-07 08:01:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 08:01:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 0 states have call successors, (0), 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 260 [2021-11-07 08:01:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:09,966 INFO L225 Difference]: With dead ends: 330 [2021-11-07 08:01:09,966 INFO L226 Difference]: Without dead ends: 263 [2021-11-07 08:01:09,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:01:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-07 08:01:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-07 08:01:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.1259541984732824) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 08:01:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2021-11-07 08:01:09,982 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 260 [2021-11-07 08:01:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:09,982 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2021-11-07 08:01:09,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 99 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 08:01:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2021-11-07 08:01:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-07 08:01:09,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:09,983 INFO L513 BasicCegarLoop]: trace histogram [128, 96, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:10,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-07 08:01:10,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-07 08:01:10,184 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash -104071887, now seen corresponding path program 95 times [2021-11-07 08:01:10,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:10,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132778430] [2021-11-07 08:01:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:10,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 6111 proven. 9312 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:01:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132778430] [2021-11-07 08:01:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132778430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:13,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157607397] [2021-11-07 08:01:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:01:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:13,430 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:13,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-07 08:01:17,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 129 check-sat command(s) [2021-11-07 08:01:17,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 08:01:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 6111 proven. 9312 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:01:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157607397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:17,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:17,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-07 08:01:17,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580210052] [2021-11-07 08:01:17,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-07 08:01:17,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-07 08:01:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:01:17,957 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 100 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:01:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:18,283 INFO L93 Difference]: Finished difference Result 332 states and 396 transitions. [2021-11-07 08:01:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 08:01:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 100 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-11-07 08:01:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:18,286 INFO L225 Difference]: With dead ends: 332 [2021-11-07 08:01:18,286 INFO L226 Difference]: Without dead ends: 265 [2021-11-07 08:01:18,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:01:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-07 08:01:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-11-07 08:01:18,307 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 08:01:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2021-11-07 08:01:18,308 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 262 [2021-11-07 08:01:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2021-11-07 08:01:18,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 100 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:01:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2021-11-07 08:01:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-07 08:01:18,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:18,310 INFO L513 BasicCegarLoop]: trace histogram [129, 97, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:18,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:18,519 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash -684019628, now seen corresponding path program 96 times [2021-11-07 08:01:18,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:18,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471084265] [2021-11-07 08:01:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:18,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 6174 proven. 9506 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:01:21,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:21,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471084265] [2021-11-07 08:01:21,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471084265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:21,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883401306] [2021-11-07 08:01:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:01:21,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:21,846 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:21,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-07 08:01:25,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2021-11-07 08:01:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 08:01:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 0 proven. 7135 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2021-11-07 08:01:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883401306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:28,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:28,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 37] total 135 [2021-11-07 08:01:28,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956653291] [2021-11-07 08:01:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-07 08:01:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-07 08:01:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5549, Invalid=12541, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 08:01:28,085 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 135 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 08:01:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:32,622 INFO L93 Difference]: Finished difference Result 341 states and 408 transitions. [2021-11-07 08:01:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-07 08:01:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 135 states have internal predecessors, (273), 0 states have call successors, (0), 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 264 [2021-11-07 08:01:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:32,624 INFO L225 Difference]: With dead ends: 341 [2021-11-07 08:01:32,624 INFO L226 Difference]: Without dead ends: 272 [2021-11-07 08:01:32,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8311 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=18588, Invalid=35934, Unknown=0, NotChecked=0, Total=54522 [2021-11-07 08:01:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-07 08:01:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-11-07 08:01:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.126865671641791) internal successors, (302), 268 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:01:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 302 transitions. [2021-11-07 08:01:32,644 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 302 transitions. Word has length 264 [2021-11-07 08:01:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:32,644 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 302 transitions. [2021-11-07 08:01:32,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.022222222222222) internal successors, (273), 135 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 08:01:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 302 transitions. [2021-11-07 08:01:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-07 08:01:32,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:32,645 INFO L513 BasicCegarLoop]: trace histogram [131, 98, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:32,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-07 08:01:32,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:32,851 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:32,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1228320604, now seen corresponding path program 97 times [2021-11-07 08:01:32,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:32,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99912378] [2021-11-07 08:01:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:32,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 6435 proven. 9702 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 08:01:36,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:36,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99912378] [2021-11-07 08:01:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99912378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:36,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664509462] [2021-11-07 08:01:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:01:36,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:36,267 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:36,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-07 08:01:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 08:01:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 6435 proven. 9702 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 08:01:40,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664509462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:40,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:40,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-07 08:01:40,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329717284] [2021-11-07 08:01:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 08:01:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 08:01:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 08:01:40,789 INFO L87 Difference]: Start difference. First operand 269 states and 302 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 08:01:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:41,039 INFO L93 Difference]: Finished difference Result 340 states and 406 transitions. [2021-11-07 08:01:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-07 08:01:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 0 states have call successors, (0), 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 268 [2021-11-07 08:01:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:41,041 INFO L225 Difference]: With dead ends: 340 [2021-11-07 08:01:41,041 INFO L226 Difference]: Without dead ends: 271 [2021-11-07 08:01:41,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 08:01:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-07 08:01:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-11-07 08:01:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.125925925925926) internal successors, (304), 270 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 08:01:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 304 transitions. [2021-11-07 08:01:41,060 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 304 transitions. Word has length 268 [2021-11-07 08:01:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 304 transitions. [2021-11-07 08:01:41,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 102 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 08:01:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 304 transitions. [2021-11-07 08:01:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-07 08:01:41,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:41,062 INFO L513 BasicCegarLoop]: trace histogram [132, 99, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:41,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-07 08:01:41,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-07 08:01:41,262 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash 319634495, now seen corresponding path program 98 times [2021-11-07 08:01:41,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:41,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011250487] [2021-11-07 08:01:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:41,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6500 proven. 9900 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 08:01:44,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:44,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011250487] [2021-11-07 08:01:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011250487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:44,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946971644] [2021-11-07 08:01:44,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:01:44,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:44,702 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:44,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-07 08:01:48,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:01:48,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 08:01:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6500 proven. 9900 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 08:01:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946971644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:49,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:49,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-07 08:01:49,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772914416] [2021-11-07 08:01:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 08:01:49,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 08:01:49,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 08:01:49,402 INFO L87 Difference]: Start difference. First operand 271 states and 304 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 08:01:49,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:49,642 INFO L93 Difference]: Finished difference Result 342 states and 408 transitions. [2021-11-07 08:01:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 08:01:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 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 270 [2021-11-07 08:01:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:49,643 INFO L225 Difference]: With dead ends: 342 [2021-11-07 08:01:49,644 INFO L226 Difference]: Without dead ends: 273 [2021-11-07 08:01:49,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 08:01:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-07 08:01:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-07 08:01:49,665 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 08:01:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 306 transitions. [2021-11-07 08:01:49,666 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 306 transitions. Word has length 270 [2021-11-07 08:01:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:49,667 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 306 transitions. [2021-11-07 08:01:49,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 08:01:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 306 transitions. [2021-11-07 08:01:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-07 08:01:49,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:49,669 INFO L513 BasicCegarLoop]: trace histogram [133, 100, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:49,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-07 08:01:49,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:49,895 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1049355166, now seen corresponding path program 99 times [2021-11-07 08:01:49,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:49,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216324625] [2021-11-07 08:01:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:49,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 6565 proven. 10100 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2021-11-07 08:01:53,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:53,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216324625] [2021-11-07 08:01:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216324625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:53,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463884648] [2021-11-07 08:01:53,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:01:53,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:53,394 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:53,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-07 08:01:57,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-11-07 08:01:57,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:01:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 0 proven. 7589 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2021-11-07 08:01:59,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463884648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:59,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:59,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 38] total 139 [2021-11-07 08:01:59,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302158218] [2021-11-07 08:01:59,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-07 08:01:59,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:59,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-07 08:01:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5887, Invalid=13295, Unknown=0, NotChecked=0, Total=19182 [2021-11-07 08:01:59,816 INFO L87 Difference]: Start difference. First operand 273 states and 306 transitions. Second operand has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:04,589 INFO L93 Difference]: Finished difference Result 351 states and 420 transitions. [2021-11-07 08:02:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-07 08:02:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-11-07 08:02:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:04,591 INFO L225 Difference]: With dead ends: 351 [2021-11-07 08:02:04,591 INFO L226 Difference]: Without dead ends: 280 [2021-11-07 08:02:04,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8818 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=19729, Invalid=38111, Unknown=0, NotChecked=0, Total=57840 [2021-11-07 08:02:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-07 08:02:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2021-11-07 08:02:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1268115942028984) internal successors, (311), 276 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 311 transitions. [2021-11-07 08:02:04,618 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 311 transitions. Word has length 272 [2021-11-07 08:02:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:04,619 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 311 transitions. [2021-11-07 08:02:04,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0215827338129495) internal successors, (281), 139 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 311 transitions. [2021-11-07 08:02:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-07 08:02:04,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:04,620 INFO L513 BasicCegarLoop]: trace histogram [135, 101, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:04,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-07 08:02:04,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-07 08:02:04,823 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1713439510, now seen corresponding path program 100 times [2021-11-07 08:02:04,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:04,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899895284] [2021-11-07 08:02:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:04,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 6834 proven. 10302 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:02:08,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:08,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899895284] [2021-11-07 08:02:08,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899895284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:08,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924687719] [2021-11-07 08:02:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:02:08,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:08,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:08,358 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:08,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-07 08:02:12,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:02:12,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:12,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 08:02:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 6834 proven. 10302 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:02:13,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924687719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:13,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:13,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-07 08:02:13,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608828059] [2021-11-07 08:02:13,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 08:02:13,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 08:02:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:02:13,201 INFO L87 Difference]: Start difference. First operand 277 states and 311 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 08:02:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:13,454 INFO L93 Difference]: Finished difference Result 350 states and 418 transitions. [2021-11-07 08:02:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 08:02:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 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 276 [2021-11-07 08:02:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:13,455 INFO L225 Difference]: With dead ends: 350 [2021-11-07 08:02:13,455 INFO L226 Difference]: Without dead ends: 279 [2021-11-07 08:02:13,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:02:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-07 08:02:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-11-07 08:02:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.1258992805755397) internal successors, (313), 278 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 313 transitions. [2021-11-07 08:02:13,474 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 313 transitions. Word has length 276 [2021-11-07 08:02:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 313 transitions. [2021-11-07 08:02:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 08:02:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 313 transitions. [2021-11-07 08:02:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-07 08:02:13,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:13,476 INFO L513 BasicCegarLoop]: trace histogram [136, 102, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:13,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-07 08:02:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-07 08:02:13,676 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 320337613, now seen corresponding path program 101 times [2021-11-07 08:02:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:13,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302801361] [2021-11-07 08:02:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 6901 proven. 10506 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:02:17,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:17,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302801361] [2021-11-07 08:02:17,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302801361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:17,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123924408] [2021-11-07 08:02:17,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:02:17,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:17,320 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:17,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-07 08:02:21,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 137 check-sat command(s) [2021-11-07 08:02:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:21,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-07 08:02:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 6901 proven. 10506 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:02:22,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123924408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:22,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:22,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-07 08:02:22,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554832607] [2021-11-07 08:02:22,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-07 08:02:22,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-07 08:02:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 08:02:22,555 INFO L87 Difference]: Start difference. First operand 279 states and 313 transitions. Second operand has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 08:02:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:22,864 INFO L93 Difference]: Finished difference Result 352 states and 420 transitions. [2021-11-07 08:02:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-07 08:02:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 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 278 [2021-11-07 08:02:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:22,865 INFO L225 Difference]: With dead ends: 352 [2021-11-07 08:02:22,865 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 08:02:22,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 08:02:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 08:02:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-07 08:02:22,894 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 08:02:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2021-11-07 08:02:22,895 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 278 [2021-11-07 08:02:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:22,896 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2021-11-07 08:02:22,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 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 08:02:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2021-11-07 08:02:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-07 08:02:22,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:22,898 INFO L513 BasicCegarLoop]: trace histogram [137, 103, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:22,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-11-07 08:02:23,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-07 08:02:23,111 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:23,111 INFO L85 PathProgramCache]: Analyzing trace with hash 570033136, now seen corresponding path program 102 times [2021-11-07 08:02:23,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:23,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432037976] [2021-11-07 08:02:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:23,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 6968 proven. 10712 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:02:27,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432037976] [2021-11-07 08:02:27,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432037976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728422083] [2021-11-07 08:02:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:02:27,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:27,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:27,053 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:27,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-07 08:02:31,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 135 check-sat command(s) [2021-11-07 08:02:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:31,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:02:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 0 proven. 8057 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2021-11-07 08:02:34,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728422083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:34,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:34,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 39] total 143 [2021-11-07 08:02:34,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566644187] [2021-11-07 08:02:34,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2021-11-07 08:02:34,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-11-07 08:02:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6235, Invalid=14071, Unknown=0, NotChecked=0, Total=20306 [2021-11-07 08:02:34,149 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 143 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 08:02:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:39,177 INFO L93 Difference]: Finished difference Result 361 states and 432 transitions. [2021-11-07 08:02:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-07 08:02:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 143 states have internal predecessors, (289), 0 states have call successors, (0), 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 280 [2021-11-07 08:02:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:39,178 INFO L225 Difference]: With dead ends: 361 [2021-11-07 08:02:39,179 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 08:02:39,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9340 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=20904, Invalid=40352, Unknown=0, NotChecked=0, Total=61256 [2021-11-07 08:02:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 08:02:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 285. [2021-11-07 08:02:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.1267605633802817) internal successors, (320), 284 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 08:02:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 320 transitions. [2021-11-07 08:02:39,202 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 320 transitions. Word has length 280 [2021-11-07 08:02:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:39,203 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 320 transitions. [2021-11-07 08:02:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.020979020979021) internal successors, (289), 143 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 08:02:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 320 transitions. [2021-11-07 08:02:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-07 08:02:39,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:39,204 INFO L513 BasicCegarLoop]: trace histogram [139, 104, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:39,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:39,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-07 08:02:39,404 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 363193848, now seen corresponding path program 103 times [2021-11-07 08:02:39,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:39,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478300535] [2021-11-07 08:02:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19321 backedges. 7245 proven. 10920 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 08:02:43,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:43,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478300535] [2021-11-07 08:02:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478300535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:43,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193388919] [2021-11-07 08:02:43,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:02:43,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:43,158 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:43,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-07 08:02:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 08:02:47,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19321 backedges. 7245 proven. 10920 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 08:02:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193388919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:48,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:48,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-07 08:02:48,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828443724] [2021-11-07 08:02:48,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-07 08:02:48,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-07 08:02:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:02:48,188 INFO L87 Difference]: Start difference. First operand 285 states and 320 transitions. Second operand has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 08:02:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:48,460 INFO L93 Difference]: Finished difference Result 360 states and 430 transitions. [2021-11-07 08:02:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 08:02:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 0 states have call successors, (0), 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 284 [2021-11-07 08:02:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:48,461 INFO L225 Difference]: With dead ends: 360 [2021-11-07 08:02:48,461 INFO L226 Difference]: Without dead ends: 287 [2021-11-07 08:02:48,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:02:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-07 08:02:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-11-07 08:02:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.1258741258741258) internal successors, (322), 286 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 322 transitions. [2021-11-07 08:02:48,572 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 322 transitions. Word has length 284 [2021-11-07 08:02:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:48,573 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 322 transitions. [2021-11-07 08:02:48,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 108 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 08:02:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 322 transitions. [2021-11-07 08:02:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-07 08:02:48,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:48,574 INFO L513 BasicCegarLoop]: trace histogram [140, 105, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:48,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:48,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-07 08:02:48,774 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash -544977701, now seen corresponding path program 104 times [2021-11-07 08:02:48,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:48,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420500220] [2021-11-07 08:02:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:48,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 7314 proven. 11130 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 08:02:52,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:52,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420500220] [2021-11-07 08:02:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420500220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:52,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584415935] [2021-11-07 08:02:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:52,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:52,582 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:52,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-07 08:02:57,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:57,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-07 08:02:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19600 backedges. 7314 proven. 11130 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 08:02:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584415935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:57,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:57,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2021-11-07 08:02:57,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597470375] [2021-11-07 08:02:57,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-07 08:02:57,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-07 08:02:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 08:02:57,765 INFO L87 Difference]: Start difference. First operand 287 states and 322 transitions. Second operand has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 08:02:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:58,073 INFO L93 Difference]: Finished difference Result 362 states and 432 transitions. [2021-11-07 08:02:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-07 08:02:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 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 286 [2021-11-07 08:02:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:58,074 INFO L225 Difference]: With dead ends: 362 [2021-11-07 08:02:58,074 INFO L226 Difference]: Without dead ends: 289 [2021-11-07 08:02:58,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 08:02:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-07 08:02:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-07 08:02:58,092 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 08:02:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2021-11-07 08:02:58,093 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 286 [2021-11-07 08:02:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:58,093 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2021-11-07 08:02:58,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 08:02:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2021-11-07 08:02:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-07 08:02:58,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:58,095 INFO L513 BasicCegarLoop]: trace histogram [141, 106, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:58,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:58,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:58,295 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1419475202, now seen corresponding path program 105 times [2021-11-07 08:02:58,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:58,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471943189] [2021-11-07 08:02:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:58,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19881 backedges. 7383 proven. 11342 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-07 08:03:02,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:02,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471943189] [2021-11-07 08:03:02,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471943189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:02,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384133355] [2021-11-07 08:03:02,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:02,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:02,337 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:02,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-07 08:03:06,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-11-07 08:03:06,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:06,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:03:06,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19881 backedges. 0 proven. 8539 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2021-11-07 08:03:09,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384133355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:09,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:09,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 40] total 147 [2021-11-07 08:03:09,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69017744] [2021-11-07 08:03:09,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-07 08:03:09,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-07 08:03:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6593, Invalid=14869, Unknown=0, NotChecked=0, Total=21462 [2021-11-07 08:03:09,462 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 147 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 08:03:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:14,732 INFO L93 Difference]: Finished difference Result 371 states and 444 transitions. [2021-11-07 08:03:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-07 08:03:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 147 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) Word has length 288 [2021-11-07 08:03:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:14,734 INFO L225 Difference]: With dead ends: 371 [2021-11-07 08:03:14,734 INFO L226 Difference]: Without dead ends: 296 [2021-11-07 08:03:14,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9877 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=22113, Invalid=42657, Unknown=0, NotChecked=0, Total=64770 [2021-11-07 08:03:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-07 08:03:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2021-11-07 08:03:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1267123287671232) internal successors, (329), 292 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 08:03:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 329 transitions. [2021-11-07 08:03:14,762 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 329 transitions. Word has length 288 [2021-11-07 08:03:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:14,762 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 329 transitions. [2021-11-07 08:03:14,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.020408163265306) internal successors, (297), 147 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 08:03:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 329 transitions. [2021-11-07 08:03:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-07 08:03:14,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:14,764 INFO L513 BasicCegarLoop]: trace histogram [143, 107, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:14,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-07 08:03:14,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-11-07 08:03:14,971 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1989905030, now seen corresponding path program 106 times [2021-11-07 08:03:14,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:14,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714938364] [2021-11-07 08:03:14,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:14,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20449 backedges. 7668 proven. 11556 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 08:03:19,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:19,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714938364] [2021-11-07 08:03:19,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714938364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:19,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761473493] [2021-11-07 08:03:19,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:19,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:19,238 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:19,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-07 08:03:24,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:24,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:24,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-07 08:03:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20449 backedges. 7668 proven. 11556 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 08:03:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761473493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:24,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:24,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-07 08:03:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634955088] [2021-11-07 08:03:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 08:03:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 08:03:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 08:03:24,726 INFO L87 Difference]: Start difference. First operand 293 states and 329 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 08:03:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:25,057 INFO L93 Difference]: Finished difference Result 370 states and 442 transitions. [2021-11-07 08:03:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 08:03:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 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 292 [2021-11-07 08:03:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:25,058 INFO L225 Difference]: With dead ends: 370 [2021-11-07 08:03:25,058 INFO L226 Difference]: Without dead ends: 295 [2021-11-07 08:03:25,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 08:03:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-07 08:03:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2021-11-07 08:03:25,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.1258503401360545) internal successors, (331), 294 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2021-11-07 08:03:25,077 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 292 [2021-11-07 08:03:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:25,077 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2021-11-07 08:03:25,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 08:03:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2021-11-07 08:03:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-07 08:03:25,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:25,079 INFO L513 BasicCegarLoop]: trace histogram [144, 108, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:25,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-07 08:03:25,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:25,279 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1063411305, now seen corresponding path program 107 times [2021-11-07 08:03:25,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:25,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442322863] [2021-11-07 08:03:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:25,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20736 backedges. 7739 proven. 11772 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 08:03:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:29,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442322863] [2021-11-07 08:03:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442322863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:29,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404324235] [2021-11-07 08:03:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:29,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:29,588 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:29,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-07 08:03:34,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 145 check-sat command(s) [2021-11-07 08:03:34,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 08:03:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20736 backedges. 7739 proven. 11772 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 08:03:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404324235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:35,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:35,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2021-11-07 08:03:35,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404577448] [2021-11-07 08:03:35,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-07 08:03:35,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-07 08:03:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:03:35,308 INFO L87 Difference]: Start difference. First operand 295 states and 331 transitions. Second operand has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 112 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 08:03:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:35,621 INFO L93 Difference]: Finished difference Result 372 states and 444 transitions. [2021-11-07 08:03:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-07 08:03:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 112 states have internal predecessors, (229), 0 states have call successors, (0), 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 294 [2021-11-07 08:03:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:35,622 INFO L225 Difference]: With dead ends: 372 [2021-11-07 08:03:35,622 INFO L226 Difference]: Without dead ends: 297 [2021-11-07 08:03:35,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:03:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-07 08:03:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-11-07 08:03:35,638 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 08:03:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 333 transitions. [2021-11-07 08:03:35,639 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 333 transitions. Word has length 294 [2021-11-07 08:03:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:35,639 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 333 transitions. [2021-11-07 08:03:35,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 112 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 08:03:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 333 transitions. [2021-11-07 08:03:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-07 08:03:35,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:35,640 INFO L513 BasicCegarLoop]: trace histogram [145, 109, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:35,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-11-07 08:03:35,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:35,841 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:35,841 INFO L85 PathProgramCache]: Analyzing trace with hash -238828148, now seen corresponding path program 108 times [2021-11-07 08:03:35,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:35,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909076473] [2021-11-07 08:03:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:35,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21025 backedges. 7810 proven. 11990 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-11-07 08:03:40,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:40,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909076473] [2021-11-07 08:03:40,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909076473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:40,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148867112] [2021-11-07 08:03:40,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:40,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:40,265 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:40,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-07 08:03:45,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 143 check-sat command(s) [2021-11-07 08:03:45,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:03:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21025 backedges. 0 proven. 9035 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2021-11-07 08:03:47,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148867112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:47,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:47,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 41] total 151 [2021-11-07 08:03:47,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734478188] [2021-11-07 08:03:47,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-11-07 08:03:47,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-11-07 08:03:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6961, Invalid=15689, Unknown=0, NotChecked=0, Total=22650 [2021-11-07 08:03:47,964 INFO L87 Difference]: Start difference. First operand 297 states and 333 transitions. Second operand has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 151 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 08:03:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:53,458 INFO L93 Difference]: Finished difference Result 381 states and 456 transitions. [2021-11-07 08:03:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-07 08:03:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 151 states have internal predecessors, (305), 0 states have call successors, (0), 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 296 [2021-11-07 08:03:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:53,459 INFO L225 Difference]: With dead ends: 381 [2021-11-07 08:03:53,459 INFO L226 Difference]: Without dead ends: 304 [2021-11-07 08:03:53,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=23356, Invalid=45026, Unknown=0, NotChecked=0, Total=68382 [2021-11-07 08:03:53,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-07 08:03:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 301. [2021-11-07 08:03:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1266666666666667) internal successors, (338), 300 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 338 transitions. [2021-11-07 08:03:53,480 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 338 transitions. Word has length 296 [2021-11-07 08:03:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:53,480 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 338 transitions. [2021-11-07 08:03:53,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.019867549668874) internal successors, (305), 151 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 08:03:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 338 transitions. [2021-11-07 08:03:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-07 08:03:53,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:53,482 INFO L513 BasicCegarLoop]: trace histogram [147, 110, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:53,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-07 08:03:53,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-07 08:03:53,682 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash -632812908, now seen corresponding path program 109 times [2021-11-07 08:03:53,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:53,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381387220] [2021-11-07 08:03:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:53,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21609 backedges. 8103 proven. 12210 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:03:57,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:57,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381387220] [2021-11-07 08:03:57,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381387220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:57,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769779238] [2021-11-07 08:03:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:03:57,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:57,818 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:57,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-07 08:04:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:02,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 08:04:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21609 backedges. 8103 proven. 12210 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:04:03,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769779238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:03,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:03,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2021-11-07 08:04:03,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477736099] [2021-11-07 08:04:03,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 08:04:03,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 08:04:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 08:04:03,461 INFO L87 Difference]: Start difference. First operand 301 states and 338 transitions. Second operand has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 08:04:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:03,729 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2021-11-07 08:04:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 08:04:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 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 300 [2021-11-07 08:04:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:03,730 INFO L225 Difference]: With dead ends: 380 [2021-11-07 08:04:03,730 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 08:04:03,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 08:04:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 08:04:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-11-07 08:04:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.1258278145695364) internal successors, (340), 302 states have internal predecessors, (340), 0 states have call successors, (0), 0 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 08:04:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 340 transitions. [2021-11-07 08:04:03,747 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 340 transitions. Word has length 300 [2021-11-07 08:04:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:03,747 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 340 transitions. [2021-11-07 08:04:03,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 08:04:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 340 transitions. [2021-11-07 08:04:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-07 08:04:03,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:03,749 INFO L513 BasicCegarLoop]: trace histogram [148, 111, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:03,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-07 08:04:03,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-07 08:04:03,949 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1564101495, now seen corresponding path program 110 times [2021-11-07 08:04:03,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:03,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033066748] [2021-11-07 08:04:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:03,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21904 backedges. 8176 proven. 12432 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:04:08,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:08,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033066748] [2021-11-07 08:04:08,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033066748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:08,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685252560] [2021-11-07 08:04:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:08,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:08,173 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:08,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-07 08:04:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-07 08:04:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21904 backedges. 8176 proven. 12432 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:04:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685252560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:13,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:13,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2021-11-07 08:04:13,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528196212] [2021-11-07 08:04:13,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 08:04:13,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 08:04:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 08:04:13,940 INFO L87 Difference]: Start difference. First operand 303 states and 340 transitions. Second operand has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 115 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 08:04:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:14,238 INFO L93 Difference]: Finished difference Result 382 states and 456 transitions. [2021-11-07 08:04:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 08:04:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 115 states have internal predecessors, (235), 0 states have call successors, (0), 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 302 [2021-11-07 08:04:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:14,239 INFO L225 Difference]: With dead ends: 382 [2021-11-07 08:04:14,239 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 08:04:14,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 08:04:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 08:04:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-07 08:04:14,255 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 08:04:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 342 transitions. [2021-11-07 08:04:14,255 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 342 transitions. Word has length 302 [2021-11-07 08:04:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:14,256 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 342 transitions. [2021-11-07 08:04:14,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 115 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 08:04:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 342 transitions. [2021-11-07 08:04:14,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-07 08:04:14,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:14,257 INFO L513 BasicCegarLoop]: trace histogram [149, 112, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:14,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-07 08:04:14,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-07 08:04:14,457 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash -325066854, now seen corresponding path program 111 times [2021-11-07 08:04:14,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:14,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813426395] [2021-11-07 08:04:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:14,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22201 backedges. 8249 proven. 12656 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:04:18,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:18,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813426395] [2021-11-07 08:04:18,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813426395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:18,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843604589] [2021-11-07 08:04:18,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:04:18,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:18,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:18,759 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:18,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-07 08:04:23,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2021-11-07 08:04:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:23,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:04:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22201 backedges. 0 proven. 9545 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2021-11-07 08:04:26,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843604589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:26,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:26,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 42] total 155 [2021-11-07 08:04:26,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379283149] [2021-11-07 08:04:26,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-11-07 08:04:26,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-11-07 08:04:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7339, Invalid=16531, Unknown=0, NotChecked=0, Total=23870 [2021-11-07 08:04:26,639 INFO L87 Difference]: Start difference. First operand 305 states and 342 transitions. Second operand has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 155 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:32,490 INFO L93 Difference]: Finished difference Result 391 states and 468 transitions. [2021-11-07 08:04:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-07 08:04:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 155 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-11-07 08:04:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:32,491 INFO L225 Difference]: With dead ends: 391 [2021-11-07 08:04:32,491 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 08:04:32,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10996 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=24633, Invalid=47459, Unknown=0, NotChecked=0, Total=72092 [2021-11-07 08:04:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 08:04:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2021-11-07 08:04:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1266233766233766) internal successors, (347), 308 states have internal predecessors, (347), 0 states have call successors, (0), 0 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 08:04:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 347 transitions. [2021-11-07 08:04:32,524 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 347 transitions. Word has length 304 [2021-11-07 08:04:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:32,525 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 347 transitions. [2021-11-07 08:04:32,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.0193548387096776) internal successors, (313), 155 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 347 transitions. [2021-11-07 08:04:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-07 08:04:32,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:32,527 INFO L513 BasicCegarLoop]: trace histogram [151, 113, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:32,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-07 08:04:32,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-07 08:04:32,730 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1012169182, now seen corresponding path program 112 times [2021-11-07 08:04:32,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:32,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683422250] [2021-11-07 08:04:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:32,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22801 backedges. 8550 proven. 12882 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:04:37,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683422250] [2021-11-07 08:04:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683422250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420474104] [2021-11-07 08:04:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:04:37,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:37,275 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-07 08:04:42,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:04:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-07 08:04:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22801 backedges. 8550 proven. 12882 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:04:43,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420474104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:43,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:43,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2021-11-07 08:04:43,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005872953] [2021-11-07 08:04:43,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 08:04:43,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 08:04:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 08:04:43,147 INFO L87 Difference]: Start difference. First operand 309 states and 347 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 08:04:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:43,455 INFO L93 Difference]: Finished difference Result 390 states and 466 transitions. [2021-11-07 08:04:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-07 08:04:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 0 states have call successors, (0), 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 308 [2021-11-07 08:04:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:43,456 INFO L225 Difference]: With dead ends: 390 [2021-11-07 08:04:43,456 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 08:04:43,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 08:04:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 08:04:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2021-11-07 08:04:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1258064516129032) internal successors, (349), 310 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 08:04:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 349 transitions. [2021-11-07 08:04:43,475 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 349 transitions. Word has length 308 [2021-11-07 08:04:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 349 transitions. [2021-11-07 08:04:43,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 117 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 08:04:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 349 transitions. [2021-11-07 08:04:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-07 08:04:43,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:43,477 INFO L513 BasicCegarLoop]: trace histogram [152, 114, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:43,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-11-07 08:04:43,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:43,678 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash -921947131, now seen corresponding path program 113 times [2021-11-07 08:04:43,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:43,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782923473] [2021-11-07 08:04:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:43,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23104 backedges. 8625 proven. 13110 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:04:48,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:48,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782923473] [2021-11-07 08:04:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782923473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:48,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540920814] [2021-11-07 08:04:48,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:04:48,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:48,186 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:48,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-07 08:04:53,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 153 check-sat command(s) [2021-11-07 08:04:53,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 08:04:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23104 backedges. 8625 proven. 13110 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:04:54,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540920814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:54,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:54,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 118 [2021-11-07 08:04:54,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897249436] [2021-11-07 08:04:54,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-07 08:04:54,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-07 08:04:54,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 08:04:54,499 INFO L87 Difference]: Start difference. First operand 311 states and 349 transitions. Second operand has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 118 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 08:04:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:54,807 INFO L93 Difference]: Finished difference Result 392 states and 468 transitions. [2021-11-07 08:04:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-07 08:04:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 118 states have internal predecessors, (241), 0 states have call successors, (0), 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 310 [2021-11-07 08:04:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:54,808 INFO L225 Difference]: With dead ends: 392 [2021-11-07 08:04:54,808 INFO L226 Difference]: Without dead ends: 313 [2021-11-07 08:04:54,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 08:04:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-07 08:04:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-07 08:04:54,827 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 08:04:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 351 transitions. [2021-11-07 08:04:54,828 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 351 transitions. Word has length 310 [2021-11-07 08:04:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 351 transitions. [2021-11-07 08:04:54,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 118 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 08:04:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 351 transitions. [2021-11-07 08:04:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-07 08:04:54,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:54,830 INFO L513 BasicCegarLoop]: trace histogram [153, 115, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:54,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:55,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:55,047 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash -117902040, now seen corresponding path program 114 times [2021-11-07 08:04:55,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:55,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45509926] [2021-11-07 08:04:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:55,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23409 backedges. 8700 proven. 13340 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-11-07 08:04:59,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:59,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45509926] [2021-11-07 08:04:59,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45509926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:59,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354569721] [2021-11-07 08:04:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:04:59,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:59,578 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:59,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-07 08:05:05,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 151 check-sat command(s) [2021-11-07 08:05:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:05:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23409 backedges. 0 proven. 10069 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2021-11-07 08:05:08,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354569721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:08,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:08,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 43] total 159 [2021-11-07 08:05:08,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728399255] [2021-11-07 08:05:08,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-11-07 08:05:08,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-11-07 08:05:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7727, Invalid=17395, Unknown=0, NotChecked=0, Total=25122 [2021-11-07 08:05:08,046 INFO L87 Difference]: Start difference. First operand 313 states and 351 transitions. Second operand has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 159 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 08:05:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:14,148 INFO L93 Difference]: Finished difference Result 401 states and 480 transitions. [2021-11-07 08:05:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-07 08:05:14,149 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 159 states have internal predecessors, (321), 0 states have call successors, (0), 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 312 [2021-11-07 08:05:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:14,149 INFO L225 Difference]: With dead ends: 401 [2021-11-07 08:05:14,149 INFO L226 Difference]: Without dead ends: 320 [2021-11-07 08:05:14,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11578 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=25944, Invalid=49956, Unknown=0, NotChecked=0, Total=75900 [2021-11-07 08:05:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-07 08:05:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2021-11-07 08:05:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.1265822784810127) internal successors, (356), 316 states have internal predecessors, (356), 0 states have call successors, (0), 0 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 08:05:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 356 transitions. [2021-11-07 08:05:14,171 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 356 transitions. Word has length 312 [2021-11-07 08:05:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:14,171 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 356 transitions. [2021-11-07 08:05:14,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.018867924528302) internal successors, (321), 159 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 08:05:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 356 transitions. [2021-11-07 08:05:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-07 08:05:14,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:14,173 INFO L513 BasicCegarLoop]: trace histogram [155, 116, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:14,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-07 08:05:14,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-07 08:05:14,373 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1656873680, now seen corresponding path program 115 times [2021-11-07 08:05:14,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:14,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621746978] [2021-11-07 08:05:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:14,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24025 backedges. 9009 proven. 13572 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2021-11-07 08:05:19,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:19,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621746978] [2021-11-07 08:05:19,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621746978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:19,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419728499] [2021-11-07 08:05:19,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:05:19,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:19,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:19,037 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:19,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33e22633-211b-4a22-a677-9f8d96b4c24e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process