./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_dekker.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/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_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_dekker.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/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_8cf086cc-11b9-4560-820b-eb8d2056958d/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 ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:40:51,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:40:51,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:40:51,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:40:51,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:40:51,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:40:51,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:40:51,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:40:51,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:40:51,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:40:51,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:40:51,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:40:51,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:40:51,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:40:51,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:40:51,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:40:51,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:40:51,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:40:51,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:40:51,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:40:51,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:40:51,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:40:51,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:40:51,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:40:51,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:40:51,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:40:51,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:40:51,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:40:51,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:40:51,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:40:51,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:40:51,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:40:51,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:40:51,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:40:51,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:40:51,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:40:51,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:40:51,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:40:51,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:40:51,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:40:51,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:40:51,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:40:52,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:40:52,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:40:52,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:40:52,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:40:52,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:40:52,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:40:52,044 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:40:52,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:40:52,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:40:52,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:40:52,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:40:52,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:40:52,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:40:52,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:40:52,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:40:52,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:40:52,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:40:52,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:40:52,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:40:52,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:40:52,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:40:52,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:40:52,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:40:52,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:40:52,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:40:52,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:40:52,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:40:52,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:40:52,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:40:52,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:40:52,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:40:52,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:40:52,056 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_8cf086cc-11b9-4560-820b-eb8d2056958d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee7ff83d9ca4f9baaadd009c98a7dd30697b6140296199117a6b05757b5b9f74 [2021-11-07 08:40:52,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:40:52,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:40:52,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:40:52,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:40:52,460 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:40:52,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-pthread/cs_dekker.i [2021-11-07 08:40:52,560 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/data/6172b45af/c526758a00354e1eabf1efa0cfb1652d/FLAG9afd5bd46 [2021-11-07 08:40:53,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:40:53,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/sv-benchmarks/c/seq-pthread/cs_dekker.i [2021-11-07 08:40:53,263 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/data/6172b45af/c526758a00354e1eabf1efa0cfb1652d/FLAG9afd5bd46 [2021-11-07 08:40:53,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/data/6172b45af/c526758a00354e1eabf1efa0cfb1652d [2021-11-07 08:40:53,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:40:53,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:40:53,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:40:53,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:40:53,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:40:53,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:40:53" (1/1) ... [2021-11-07 08:40:53,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f1687a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:53, skipping insertion in model container [2021-11-07 08:40:53,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:40:53" (1/1) ... [2021-11-07 08:40:53,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:40:53,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:40:53,993 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_8cf086cc-11b9-4560-820b-eb8d2056958d/sv-benchmarks/c/seq-pthread/cs_dekker.i[23603,23616] [2021-11-07 08:40:54,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:40:54,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:40:54,226 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_8cf086cc-11b9-4560-820b-eb8d2056958d/sv-benchmarks/c/seq-pthread/cs_dekker.i[23603,23616] [2021-11-07 08:40:54,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:40:54,401 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:40:54,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54 WrapperNode [2021-11-07 08:40:54,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:40:54,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:40:54,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:40:54,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:40:54,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:40:54,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:40:54,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:40:54,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:40:54,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:40:54,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:40:54,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:40:54,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:40:54,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (1/1) ... [2021-11-07 08:40:54,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:40:54,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:40:54,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:40:54,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:40:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:40:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:40:54,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:40:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:40:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:40:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:40:54,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 08:40:54,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:40:54,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:40:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:40:59,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:40:59,248 INFO L299 CfgBuilder]: Removed 174 assume(true) statements. [2021-11-07 08:40:59,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:40:59 BoogieIcfgContainer [2021-11-07 08:40:59,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:40:59,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:40:59,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:40:59,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:40:59,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:40:53" (1/3) ... [2021-11-07 08:40:59,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9042b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:40:59, skipping insertion in model container [2021-11-07 08:40:59,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:40:54" (2/3) ... [2021-11-07 08:40:59,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9042b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:40:59, skipping insertion in model container [2021-11-07 08:40:59,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:40:59" (3/3) ... [2021-11-07 08:40:59,278 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_dekker.i [2021-11-07 08:40:59,284 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:40:59,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:40:59,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:40:59,385 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 08:40:59,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:40:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 223 states have (on average 1.5739910313901346) internal successors, (351), 224 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 08:40:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:40:59,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:59,435 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:59,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:40:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1571852267, now seen corresponding path program 1 times [2021-11-07 08:40:59,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:40:59,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447430020] [2021-11-07 08:40:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:40:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:59,953 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 08:40:59,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:40:59,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447430020] [2021-11-07 08:40:59,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447430020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:40:59,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:40:59,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:40:59,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586378697] [2021-11-07 08:40:59,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:40:59,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:40:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:40:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:40:59,995 INFO L87 Difference]: Start difference. First operand has 225 states, 223 states have (on average 1.5739910313901346) internal successors, (351), 224 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) Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 08:41:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:00,138 INFO L93 Difference]: Finished difference Result 452 states and 708 transitions. [2021-11-07 08:41:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:41:00,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:41:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:00,162 INFO L225 Difference]: With dead ends: 452 [2021-11-07 08:41:00,162 INFO L226 Difference]: Without dead ends: 225 [2021-11-07 08:41:00,167 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 08:41:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-07 08:41:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-11-07 08:41:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.3619909502262444) internal successors, (301), 221 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 301 transitions. [2021-11-07 08:41:00,228 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 301 transitions. Word has length 52 [2021-11-07 08:41:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:00,228 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 301 transitions. [2021-11-07 08:41:00,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 08:41:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 301 transitions. [2021-11-07 08:41:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:41:00,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:00,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:00,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:41:00,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1964612339, now seen corresponding path program 1 times [2021-11-07 08:41:00,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:00,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644893191] [2021-11-07 08:41:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:00,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:00,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:00,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644893191] [2021-11-07 08:41:00,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644893191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:00,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:00,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:41:00,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329108973] [2021-11-07 08:41:00,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:41:00,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:41:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:41:00,417 INFO L87 Difference]: Start difference. First operand 222 states and 301 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 08:41:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:00,463 INFO L93 Difference]: Finished difference Result 443 states and 602 transitions. [2021-11-07 08:41:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:41:00,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 55 [2021-11-07 08:41:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:00,468 INFO L225 Difference]: With dead ends: 443 [2021-11-07 08:41:00,469 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 08:41:00,471 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 08:41:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 08:41:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-11-07 08:41:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.3603603603603605) internal successors, (302), 222 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 08:41:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 302 transitions. [2021-11-07 08:41:00,494 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 302 transitions. Word has length 55 [2021-11-07 08:41:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 302 transitions. [2021-11-07 08:41:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 08:41:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 302 transitions. [2021-11-07 08:41:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:41:00,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:00,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:00,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:41:00,501 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -963956107, now seen corresponding path program 1 times [2021-11-07 08:41:00,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:00,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363008838] [2021-11-07 08:41:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:00,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:00,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:00,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363008838] [2021-11-07 08:41:00,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363008838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:00,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931434385] [2021-11-07 08:41:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:00,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:00,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:00,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:00,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:41:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:41:00,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931434385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:01,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:41:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496683771] [2021-11-07 08:41:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:41:01,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:01,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:41:01,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:41:01,344 INFO L87 Difference]: Start difference. First operand 223 states and 302 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:01,420 INFO L93 Difference]: Finished difference Result 446 states and 605 transitions. [2021-11-07 08:41:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:41:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 08:41:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:01,425 INFO L225 Difference]: With dead ends: 446 [2021-11-07 08:41:01,425 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 08:41:01,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 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 08:41:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 08:41:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-11-07 08:41:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3571428571428572) internal successors, (304), 224 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 08:41:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 304 transitions. [2021-11-07 08:41:01,446 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 304 transitions. Word has length 57 [2021-11-07 08:41:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:01,447 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 304 transitions. [2021-11-07 08:41:01,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 304 transitions. [2021-11-07 08:41:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:41:01,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:01,451 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:01,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:01,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:01,653 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2114653833, now seen corresponding path program 2 times [2021-11-07 08:41:01,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:01,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352849741] [2021-11-07 08:41:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:01,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:41:01,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:01,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352849741] [2021-11-07 08:41:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352849741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:01,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5486925] [2021-11-07 08:41:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:41:01,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:01,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:01,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:01,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:41:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:41:02,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:41:02,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:41:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5486925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:02,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:41:02,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 08:41:02,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610167148] [2021-11-07 08:41:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:41:02,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:41:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:02,899 INFO L87 Difference]: Start difference. First operand 225 states and 304 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 08:41:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:02,977 INFO L93 Difference]: Finished difference Result 404 states and 543 transitions. [2021-11-07 08:41:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:41:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 59 [2021-11-07 08:41:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:02,987 INFO L225 Difference]: With dead ends: 404 [2021-11-07 08:41:02,987 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 08:41:02,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:41:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 08:41:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-07 08:41:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.3735632183908046) internal successors, (478), 348 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 478 transitions. [2021-11-07 08:41:03,041 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 478 transitions. Word has length 59 [2021-11-07 08:41:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:03,043 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 478 transitions. [2021-11-07 08:41:03,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 08:41:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 478 transitions. [2021-11-07 08:41:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:41:03,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:03,050 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:03,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:03,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:03,258 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1204976254, now seen corresponding path program 1 times [2021-11-07 08:41:03,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:03,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277472153] [2021-11-07 08:41:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:03,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:41:03,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:03,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277472153] [2021-11-07 08:41:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277472153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:03,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624730351] [2021-11-07 08:41:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:03,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:03,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:03,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:03,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:41:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:41:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:41:04,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624730351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:04,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:04,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-07 08:41:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191993760] [2021-11-07 08:41:04,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:41:04,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:41:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:41:04,279 INFO L87 Difference]: Start difference. First operand 349 states and 478 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 08:41:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:04,496 INFO L93 Difference]: Finished difference Result 714 states and 978 transitions. [2021-11-07 08:41:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:41:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) Word has length 97 [2021-11-07 08:41:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:04,501 INFO L225 Difference]: With dead ends: 714 [2021-11-07 08:41:04,501 INFO L226 Difference]: Without dead ends: 368 [2021-11-07 08:41:04,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:41:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-07 08:41:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 360. [2021-11-07 08:41:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.3649025069637883) internal successors, (490), 359 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 490 transitions. [2021-11-07 08:41:04,520 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 490 transitions. Word has length 97 [2021-11-07 08:41:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:04,520 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 490 transitions. [2021-11-07 08:41:04,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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 08:41:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 490 transitions. [2021-11-07 08:41:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 08:41:04,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:04,524 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:04,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:04,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:04,750 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash 917322002, now seen corresponding path program 2 times [2021-11-07 08:41:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:04,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677107890] [2021-11-07 08:41:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:04,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:41:05,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:05,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677107890] [2021-11-07 08:41:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677107890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:05,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986579426] [2021-11-07 08:41:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:41:05,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:05,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:05,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:41:05,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:41:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:41:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-07 08:41:06,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986579426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:06,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:41:06,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-07 08:41:06,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155762087] [2021-11-07 08:41:06,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:41:06,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:41:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:41:06,117 INFO L87 Difference]: Start difference. First operand 360 states and 490 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 08:41:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:08,055 INFO L93 Difference]: Finished difference Result 1704 states and 2288 transitions. [2021-11-07 08:41:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:41:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 108 [2021-11-07 08:41:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:08,070 INFO L225 Difference]: With dead ends: 1704 [2021-11-07 08:41:08,070 INFO L226 Difference]: Without dead ends: 1437 [2021-11-07 08:41:08,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:41:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-11-07 08:41:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1097. [2021-11-07 08:41:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 1.3658759124087592) internal successors, (1497), 1096 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1497 transitions. [2021-11-07 08:41:08,124 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1497 transitions. Word has length 108 [2021-11-07 08:41:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:08,125 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1497 transitions. [2021-11-07 08:41:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 08:41:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1497 transitions. [2021-11-07 08:41:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 08:41:08,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:08,130 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:08,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:08,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:41:08,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1111264108, now seen corresponding path program 1 times [2021-11-07 08:41:08,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:08,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433833369] [2021-11-07 08:41:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:08,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:41:08,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:08,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433833369] [2021-11-07 08:41:08,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433833369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:08,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639071903] [2021-11-07 08:41:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:08,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:08,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:08,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:08,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:41:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:41:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:41:09,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639071903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:09,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:09,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:41:09,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788931721] [2021-11-07 08:41:09,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:41:09,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:41:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:09,426 INFO L87 Difference]: Start difference. First operand 1097 states and 1497 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 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 08:41:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:09,572 INFO L93 Difference]: Finished difference Result 2182 states and 2981 transitions. [2021-11-07 08:41:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:41:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 08:41:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:09,581 INFO L225 Difference]: With dead ends: 2182 [2021-11-07 08:41:09,582 INFO L226 Difference]: Without dead ends: 1106 [2021-11-07 08:41:09,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-07 08:41:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2021-11-07 08:41:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.3638009049773756) internal successors, (1507), 1105 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1507 transitions. [2021-11-07 08:41:09,632 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1507 transitions. Word has length 108 [2021-11-07 08:41:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:09,632 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1507 transitions. [2021-11-07 08:41:09,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 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 08:41:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1507 transitions. [2021-11-07 08:41:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:41:09,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:09,640 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:09,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 08:41:09,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:09,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1550756410, now seen corresponding path program 2 times [2021-11-07 08:41:09,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:09,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751716845] [2021-11-07 08:41:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:09,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:10,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751716845] [2021-11-07 08:41:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751716845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:10,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:10,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:41:10,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834566415] [2021-11-07 08:41:10,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:41:10,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:41:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:41:10,173 INFO L87 Difference]: Start difference. First operand 1106 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 08:41:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:10,345 INFO L93 Difference]: Finished difference Result 2241 states and 3055 transitions. [2021-11-07 08:41:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:41:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 117 [2021-11-07 08:41:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:10,355 INFO L225 Difference]: With dead ends: 2241 [2021-11-07 08:41:10,355 INFO L226 Difference]: Without dead ends: 1210 [2021-11-07 08:41:10,357 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 08:41:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-07 08:41:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2021-11-07 08:41:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 1.3523573200992556) internal successors, (1635), 1209 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1635 transitions. [2021-11-07 08:41:10,403 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1635 transitions. Word has length 117 [2021-11-07 08:41:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1635 transitions. [2021-11-07 08:41:10,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 08:41:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1635 transitions. [2021-11-07 08:41:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:41:10,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:10,408 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:10,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:41:10,409 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2043382584, now seen corresponding path program 1 times [2021-11-07 08:41:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:10,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918616785] [2021-11-07 08:41:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:10,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:10,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918616785] [2021-11-07 08:41:10,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918616785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:10,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:10,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:41:10,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214295319] [2021-11-07 08:41:10,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:41:10,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:41:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:41:10,699 INFO L87 Difference]: Start difference. First operand 1210 states and 1635 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 08:41:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:10,976 INFO L93 Difference]: Finished difference Result 2359 states and 3201 transitions. [2021-11-07 08:41:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:41:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 117 [2021-11-07 08:41:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:10,986 INFO L225 Difference]: With dead ends: 2359 [2021-11-07 08:41:10,986 INFO L226 Difference]: Without dead ends: 1358 [2021-11-07 08:41:10,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:41:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-11-07 08:41:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1358. [2021-11-07 08:41:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 1.3382461311717022) internal successors, (1816), 1357 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1816 transitions. [2021-11-07 08:41:11,040 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1816 transitions. Word has length 117 [2021-11-07 08:41:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:11,040 INFO L470 AbstractCegarLoop]: Abstraction has 1358 states and 1816 transitions. [2021-11-07 08:41:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 08:41:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1816 transitions. [2021-11-07 08:41:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:41:11,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:11,046 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:11,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:41:11,046 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1364110330, now seen corresponding path program 1 times [2021-11-07 08:41:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:11,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972284431] [2021-11-07 08:41:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:11,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:17,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:17,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972284431] [2021-11-07 08:41:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972284431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:17,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-07 08:41:17,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661410621] [2021-11-07 08:41:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:41:17,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:41:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:41:17,637 INFO L87 Difference]: Start difference. First operand 1358 states and 1816 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 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 08:41:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:26,113 INFO L93 Difference]: Finished difference Result 2159 states and 2865 transitions. [2021-11-07 08:41:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:41:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 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 117 [2021-11-07 08:41:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:26,128 INFO L225 Difference]: With dead ends: 2159 [2021-11-07 08:41:26,128 INFO L226 Difference]: Without dead ends: 1869 [2021-11-07 08:41:26,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:41:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-11-07 08:41:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1409. [2021-11-07 08:41:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 1.3302556818181819) internal successors, (1873), 1408 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1873 transitions. [2021-11-07 08:41:26,199 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1873 transitions. Word has length 117 [2021-11-07 08:41:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:26,199 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 1873 transitions. [2021-11-07 08:41:26,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 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 08:41:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1873 transitions. [2021-11-07 08:41:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:41:26,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:26,206 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:26,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:41:26,206 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1244677128, now seen corresponding path program 1 times [2021-11-07 08:41:26,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:26,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864340001] [2021-11-07 08:41:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:26,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:29,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:29,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864340001] [2021-11-07 08:41:29,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864340001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:29,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:29,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 08:41:29,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108204396] [2021-11-07 08:41:29,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:41:29,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:41:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:41:29,356 INFO L87 Difference]: Start difference. First operand 1409 states and 1873 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 10 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 08:41:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:33,668 INFO L93 Difference]: Finished difference Result 2700 states and 3611 transitions. [2021-11-07 08:41:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:41:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 10 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 117 [2021-11-07 08:41:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:33,684 INFO L225 Difference]: With dead ends: 2700 [2021-11-07 08:41:33,684 INFO L226 Difference]: Without dead ends: 2155 [2021-11-07 08:41:33,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:41:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-11-07 08:41:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1402. [2021-11-07 08:41:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 1.331192005710207) internal successors, (1865), 1401 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1865 transitions. [2021-11-07 08:41:33,759 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1865 transitions. Word has length 117 [2021-11-07 08:41:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:33,759 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1865 transitions. [2021-11-07 08:41:33,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 10 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 08:41:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1865 transitions. [2021-11-07 08:41:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:41:33,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:33,765 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:33,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:41:33,766 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 616560725, now seen corresponding path program 1 times [2021-11-07 08:41:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681018304] [2021-11-07 08:41:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:33,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:33,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:33,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681018304] [2021-11-07 08:41:33,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681018304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:33,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:33,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:41:33,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164737379] [2021-11-07 08:41:33,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:41:33,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:41:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:41:33,928 INFO L87 Difference]: Start difference. First operand 1402 states and 1865 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:34,080 INFO L93 Difference]: Finished difference Result 2404 states and 3253 transitions. [2021-11-07 08:41:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:41:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:41:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:34,090 INFO L225 Difference]: With dead ends: 2404 [2021-11-07 08:41:34,091 INFO L226 Difference]: Without dead ends: 1439 [2021-11-07 08:41:34,094 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 08:41:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-07 08:41:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1422. [2021-11-07 08:41:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 1.3251231527093597) internal successors, (1883), 1421 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1883 transitions. [2021-11-07 08:41:34,168 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1883 transitions. Word has length 120 [2021-11-07 08:41:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:34,169 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 1883 transitions. [2021-11-07 08:41:34,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1883 transitions. [2021-11-07 08:41:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:41:34,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:34,174 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:34,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:41:34,175 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1877477975, now seen corresponding path program 1 times [2021-11-07 08:41:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:34,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015040975] [2021-11-07 08:41:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:34,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:37,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:37,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015040975] [2021-11-07 08:41:37,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015040975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:37,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:37,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:41:37,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105536716] [2021-11-07 08:41:37,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:41:37,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:41:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:37,925 INFO L87 Difference]: Start difference. First operand 1422 states and 1883 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:40,832 INFO L93 Difference]: Finished difference Result 2064 states and 2728 transitions. [2021-11-07 08:41:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:41:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:41:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:40,843 INFO L225 Difference]: With dead ends: 2064 [2021-11-07 08:41:40,843 INFO L226 Difference]: Without dead ends: 1305 [2021-11-07 08:41:40,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:41:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-11-07 08:41:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1305. [2021-11-07 08:41:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.3297546012269938) internal successors, (1734), 1304 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1734 transitions. [2021-11-07 08:41:40,948 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1734 transitions. Word has length 120 [2021-11-07 08:41:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 1734 transitions. [2021-11-07 08:41:40,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1734 transitions. [2021-11-07 08:41:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:41:40,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:40,955 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:41:40,955 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash -19875468, now seen corresponding path program 1 times [2021-11-07 08:41:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:40,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851529434] [2021-11-07 08:41:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:40,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:46,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:46,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851529434] [2021-11-07 08:41:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851529434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:46,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:41:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319207276] [2021-11-07 08:41:46,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:41:46,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:41:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:46,797 INFO L87 Difference]: Start difference. First operand 1305 states and 1734 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:49,653 INFO L93 Difference]: Finished difference Result 1441 states and 1902 transitions. [2021-11-07 08:41:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:41:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:41:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:49,660 INFO L225 Difference]: With dead ends: 1441 [2021-11-07 08:41:49,660 INFO L226 Difference]: Without dead ends: 1230 [2021-11-07 08:41:49,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:41:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-07 08:41:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1228. [2021-11-07 08:41:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.3349633251833741) internal successors, (1638), 1227 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1638 transitions. [2021-11-07 08:41:49,716 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1638 transitions. Word has length 120 [2021-11-07 08:41:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1638 transitions. [2021-11-07 08:41:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1638 transitions. [2021-11-07 08:41:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:41:49,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:49,721 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:41:49,722 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 930873976, now seen corresponding path program 1 times [2021-11-07 08:41:49,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:49,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758460001] [2021-11-07 08:41:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:49,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:41:55,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:55,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758460001] [2021-11-07 08:41:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758460001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:41:55,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:41:55,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:41:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742639120] [2021-11-07 08:41:55,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:41:55,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:41:55,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:41:55,463 INFO L87 Difference]: Start difference. First operand 1228 states and 1638 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:56,193 INFO L93 Difference]: Finished difference Result 1774 states and 2308 transitions. [2021-11-07 08:41:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:41:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:41:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:56,201 INFO L225 Difference]: With dead ends: 1774 [2021-11-07 08:41:56,202 INFO L226 Difference]: Without dead ends: 1123 [2021-11-07 08:41:56,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:41:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-07 08:41:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 957. [2021-11-07 08:41:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 1.2688284518828452) internal successors, (1213), 956 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1213 transitions. [2021-11-07 08:41:56,254 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1213 transitions. Word has length 120 [2021-11-07 08:41:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:56,255 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1213 transitions. [2021-11-07 08:41:56,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:41:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1213 transitions. [2021-11-07 08:41:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:41:56,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:56,259 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:56,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:41:56,259 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:41:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1985687348, now seen corresponding path program 1 times [2021-11-07 08:41:56,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:56,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36682201] [2021-11-07 08:41:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:56,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:42:03,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:03,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36682201] [2021-11-07 08:42:03,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36682201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:03,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:03,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:42:03,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094568539] [2021-11-07 08:42:03,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:42:03,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:42:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:42:03,339 INFO L87 Difference]: Start difference. First operand 957 states and 1213 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:04,029 INFO L93 Difference]: Finished difference Result 1774 states and 2207 transitions. [2021-11-07 08:42:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:42:04,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:42:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:04,035 INFO L225 Difference]: With dead ends: 1774 [2021-11-07 08:42:04,035 INFO L226 Difference]: Without dead ends: 935 [2021-11-07 08:42:04,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:42:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-07 08:42:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 849. [2021-11-07 08:42:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.2075471698113207) internal successors, (1024), 848 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1024 transitions. [2021-11-07 08:42:04,083 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1024 transitions. Word has length 120 [2021-11-07 08:42:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:04,083 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1024 transitions. [2021-11-07 08:42:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1024 transitions. [2021-11-07 08:42:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:42:04,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:04,087 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:04,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:42:04,088 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:04,089 INFO L85 PathProgramCache]: Analyzing trace with hash 927849270, now seen corresponding path program 1 times [2021-11-07 08:42:04,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:04,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286500460] [2021-11-07 08:42:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:04,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:42:09,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:09,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286500460] [2021-11-07 08:42:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286500460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:09,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:09,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:42:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559229868] [2021-11-07 08:42:09,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:42:09,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:42:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:42:09,579 INFO L87 Difference]: Start difference. First operand 849 states and 1024 transitions. Second operand has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:13,504 INFO L93 Difference]: Finished difference Result 1347 states and 1608 transitions. [2021-11-07 08:42:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:42:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 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 08:42:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:13,512 INFO L225 Difference]: With dead ends: 1347 [2021-11-07 08:42:13,512 INFO L226 Difference]: Without dead ends: 1063 [2021-11-07 08:42:13,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:42:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-07 08:42:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 849. [2021-11-07 08:42:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.2028301886792452) internal successors, (1020), 848 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1020 transitions. [2021-11-07 08:42:13,569 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1020 transitions. Word has length 120 [2021-11-07 08:42:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:13,570 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1020 transitions. [2021-11-07 08:42:13,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1020 transitions. [2021-11-07 08:42:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 08:42:13,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:13,574 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:13,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:42:13,575 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1983775879, now seen corresponding path program 1 times [2021-11-07 08:42:13,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:13,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768572703] [2021-11-07 08:42:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:13,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-07 08:42:22,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768572703] [2021-11-07 08:42:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768572703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:42:22,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:42:22,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:42:22,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657226030] [2021-11-07 08:42:22,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:42:22,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:22,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:42:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:42:22,791 INFO L87 Difference]: Start difference. First operand 849 states and 1020 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 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 08:42:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:25,948 INFO L93 Difference]: Finished difference Result 1019 states and 1203 transitions. [2021-11-07 08:42:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:42:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-07 08:42:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:25,954 INFO L225 Difference]: With dead ends: 1019 [2021-11-07 08:42:25,954 INFO L226 Difference]: Without dead ends: 975 [2021-11-07 08:42:25,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:42:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-07 08:42:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 857. [2021-11-07 08:42:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.2021028037383177) internal successors, (1029), 856 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:42:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1029 transitions. [2021-11-07 08:42:26,008 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1029 transitions. Word has length 128 [2021-11-07 08:42:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:26,009 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1029 transitions. [2021-11-07 08:42:26,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 9 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 08:42:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1029 transitions. [2021-11-07 08:42:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 08:42:26,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:26,013 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:26,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:42:26,014 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:42:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:26,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1864021096, now seen corresponding path program 1 times [2021-11-07 08:42:26,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:26,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491306333] [2021-11-07 08:42:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:26,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:43:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:43:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:43:57,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:43:57,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491306333] [2021-11-07 08:43:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491306333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:43:57,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738398683] [2021-11-07 08:43:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:43:57,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:43:57,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:43:57,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:43:57,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf086cc-11b9-4560-820b-eb8d2056958d/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:44:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-07 08:44:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:02,354 INFO L354 Elim1Store]: treesize reduction 1320, result has 5.6 percent of original size [2021-11-07 08:44:02,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 37 case distinctions, treesize of input 2337 treesize of output 2276 [2021-11-07 08:44:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:12,532 INFO L354 Elim1Store]: treesize reduction 2213, result has 13.6 percent of original size [2021-11-07 08:44:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 17 select indices, 17 select index equivalence classes, 29 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 128 case distinctions, treesize of input 251 treesize of output 548 [2021-11-07 08:45:02,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 57 [2021-11-07 08:45:25,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:46:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:46:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:48:26,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 57 [2021-11-07 08:48:51,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:49:17,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:50:26,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:51:59,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 57 [2021-11-07 08:52:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-07 08:53:11,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25