./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX --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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:29:36,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:29:36,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:29:36,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:29:36,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:29:36,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:29:36,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:29:36,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:29:36,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:29:36,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:29:36,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:29:36,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:29:36,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:29:36,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:29:36,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:29:36,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:29:36,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:29:36,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:29:36,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:29:36,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:29:36,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:29:36,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:29:36,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:29:36,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:29:36,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:29:36,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:29:36,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:29:36,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:29:36,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:29:36,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:29:36,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:29:36,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:29:36,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:29:36,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:29:36,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:29:36,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:29:36,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:29:36,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:29:36,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:29:36,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:29:36,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:29:36,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:29:36,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:29:36,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:29:36,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:29:36,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:29:36,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:29:36,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:29:36,403 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:29:36,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:29:36,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:29:36,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:29:36,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:29:36,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:29:36,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:29:36,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:29:36,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:29:36,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:29:36,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:29:36,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:29:36,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:29:36,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:29:36,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:29:36,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:29:36,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:36,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:29:36,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:29:36,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:29:36,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:29:36,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:29:36,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:29:36,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:29:36,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:29:36,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:29:36,411 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_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2021-11-09 08:29:36,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:29:36,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:29:36,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:29:36,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:29:36,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:29:36,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops/eureka_05.i [2021-11-09 08:29:36,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/data/038de055b/1efcc7e4b9744aa291219815d13b9028/FLAG871b93779 [2021-11-09 08:29:37,283 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:29:37,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/sv-benchmarks/c/loops/eureka_05.i [2021-11-09 08:29:37,295 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/data/038de055b/1efcc7e4b9744aa291219815d13b9028/FLAG871b93779 [2021-11-09 08:29:37,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/data/038de055b/1efcc7e4b9744aa291219815d13b9028 [2021-11-09 08:29:37,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:29:37,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:29:37,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:37,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:29:37,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:29:37,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:37,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de82947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37, skipping insertion in model container [2021-11-09 08:29:37,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:37,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:29:37,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:37,886 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_6d97c21a-b718-43b7-9e73-37253d8ca5c4/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-09 08:29:37,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:37,929 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:29:37,943 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_6d97c21a-b718-43b7-9e73-37253d8ca5c4/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-09 08:29:37,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:37,984 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:29:37,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37 WrapperNode [2021-11-09 08:29:37,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:37,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:37,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:29:37,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:29:37,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:37,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:38,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:29:38,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:29:38,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:29:38,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:29:38,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:29:38,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:29:38,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:29:38,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:38,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:38,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:29:38,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:29:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:29:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:29:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:29:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:29:38,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:29:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:29:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:29:38,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:29:38,351 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 08:29:38,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:38 BoogieIcfgContainer [2021-11-09 08:29:38,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:29:38,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:29:38,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:29:38,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:29:38,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:29:37" (1/3) ... [2021-11-09 08:29:38,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17194e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:38, skipping insertion in model container [2021-11-09 08:29:38,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37" (2/3) ... [2021-11-09 08:29:38,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17194e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:38, skipping insertion in model container [2021-11-09 08:29:38,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:38" (3/3) ... [2021-11-09 08:29:38,360 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2021-11-09 08:29:38,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:29:38,366 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:29:38,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:29:38,419 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 [2021-11-09 08:29:38,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:29:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:29:38,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:38,440 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:38,441 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2021-11-09 08:29:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:38,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201125873] [2021-11-09 08:29:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:38,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:38,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:38,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201125873] [2021-11-09 08:29:38,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201125873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:38,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:38,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:38,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728422394] [2021-11-09 08:29:38,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:38,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:38,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:38,646 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:38,680 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-09 08:29:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:29:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 08:29:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:38,690 INFO L225 Difference]: With dead ends: 42 [2021-11-09 08:29:38,690 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 08:29:38,693 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 [2021-11-09 08:29:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 08:29:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-09 08:29:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 08:29:38,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-09 08:29:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:38,742 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 08:29:38,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 08:29:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:29:38,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:38,743 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:38,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:29:38,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:38,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2021-11-09 08:29:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:38,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357663745] [2021-11-09 08:29:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:38,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:38,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:38,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357663745] [2021-11-09 08:29:38,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357663745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:38,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135714710] [2021-11-09 08:29:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:38,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:38,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:38,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:38,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:29:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:29:38,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135714710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:38,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-09 08:29:38,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747822498] [2021-11-09 08:29:38,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:29:38,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:29:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:38,982 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:39,007 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-09 08:29:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:29:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 08:29:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:39,009 INFO L225 Difference]: With dead ends: 36 [2021-11-09 08:29:39,009 INFO L226 Difference]: Without dead ends: 22 [2021-11-09 08:29:39,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-09 08:29:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-09 08:29:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-09 08:29:39,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2021-11-09 08:29:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:39,015 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-09 08:29:39,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-09 08:29:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:29:39,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:39,017 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:39,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:39,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-09 08:29:39,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:39,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:39,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1566025071, now seen corresponding path program 2 times [2021-11-09 08:29:39,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:39,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023207012] [2021-11-09 08:29:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:39,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:29:39,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:39,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023207012] [2021-11-09 08:29:39,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023207012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:39,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:39,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:29:39,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058736209] [2021-11-09 08:29:39,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:29:39,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:29:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:39,367 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:39,406 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-11-09 08:29:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:29:39,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 08:29:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:39,409 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:29:39,409 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 08:29:39,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:29:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 08:29:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-09 08:29:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 08:29:39,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 08:29:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:39,422 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 08:29:39,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 08:29:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:29:39,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:39,425 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:39,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:29:39,426 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2104278057, now seen corresponding path program 1 times [2021-11-09 08:29:39,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:39,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339553521] [2021-11-09 08:29:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:39,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:29:39,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339553521] [2021-11-09 08:29:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339553521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:39,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:39,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:29:39,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366638583] [2021-11-09 08:29:39,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:29:39,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:29:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:29:39,535 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:39,603 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-11-09 08:29:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:29:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 08:29:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:39,606 INFO L225 Difference]: With dead ends: 43 [2021-11-09 08:29:39,606 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 08:29:39,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:29:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 08:29:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-11-09 08:29:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-09 08:29:39,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2021-11-09 08:29:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-09 08:29:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-09 08:29:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:29:39,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:39,616 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:29:39,617 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -913507013, now seen corresponding path program 1 times [2021-11-09 08:29:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:39,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367737173] [2021-11-09 08:29:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:39,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:29:39,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:39,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367737173] [2021-11-09 08:29:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367737173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:39,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970902748] [2021-11-09 08:29:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:39,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:39,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:39,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:39,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:29:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:29:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 08:29:39,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970902748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:39,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:39,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-09 08:29:39,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644857403] [2021-11-09 08:29:39,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:29:39,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:29:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:29:39,903 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:40,003 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-11-09 08:29:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:29:40,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 08:29:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:40,005 INFO L225 Difference]: With dead ends: 53 [2021-11-09 08:29:40,005 INFO L226 Difference]: Without dead ends: 37 [2021-11-09 08:29:40,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:29:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-09 08:29:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-09 08:29:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-09 08:29:40,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-11-09 08:29:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-09 08:29:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-09 08:29:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:29:40,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:40,015 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:40,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:40,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:40,223 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash 34400469, now seen corresponding path program 2 times [2021-11-09 08:29:40,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:40,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395897076] [2021-11-09 08:29:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:40,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:29:40,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:40,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395897076] [2021-11-09 08:29:40,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395897076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:40,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750043954] [2021-11-09 08:29:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:29:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:40,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:40,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:29:40,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:29:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:29:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:29:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750043954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:40,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-09 08:29:40,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379152358] [2021-11-09 08:29:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:29:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:29:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:29:40,508 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:40,643 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-11-09 08:29:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:29:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-09 08:29:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:40,645 INFO L225 Difference]: With dead ends: 66 [2021-11-09 08:29:40,646 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:29:40,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:29:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:29:40,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-09 08:29:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-09 08:29:40,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2021-11-09 08:29:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:40,653 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-09 08:29:40,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-09 08:29:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:29:40,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:40,655 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:40,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:40,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:40,877 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:40,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 593601357, now seen corresponding path program 3 times [2021-11-09 08:29:40,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:40,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673913928] [2021-11-09 08:29:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:40,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:29:40,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:40,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673913928] [2021-11-09 08:29:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673913928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:40,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528930421] [2021-11-09 08:29:40,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:29:40,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:40,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:41,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:29:41,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:29:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:29:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:29:41,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528930421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:41,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:41,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-09 08:29:41,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754258587] [2021-11-09 08:29:41,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:29:41,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:29:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:29:41,243 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:41,323 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-11-09 08:29:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:29:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 08:29:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:41,325 INFO L225 Difference]: With dead ends: 56 [2021-11-09 08:29:41,325 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 08:29:41,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:29:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 08:29:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-11-09 08:29:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-09 08:29:41,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 31 [2021-11-09 08:29:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:41,332 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-09 08:29:41,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-09 08:29:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:29:41,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:41,333 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:41,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:41,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:41,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1074369433, now seen corresponding path program 4 times [2021-11-09 08:29:41,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:41,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606162671] [2021-11-09 08:29:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:41,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 08:29:41,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:41,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606162671] [2021-11-09 08:29:41,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606162671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:41,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862437575] [2021-11-09 08:29:41,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:29:41,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:41,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:41,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:41,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:29:41,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:29:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:41,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:29:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:29:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862437575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:41,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:41,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-09 08:29:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178621516] [2021-11-09 08:29:41,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:29:41,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:29:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:29:41,887 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:42,106 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2021-11-09 08:29:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:29:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:29:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:42,107 INFO L225 Difference]: With dead ends: 72 [2021-11-09 08:29:42,107 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:29:42,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:29:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:29:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-09 08:29:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-09 08:29:42,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2021-11-09 08:29:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-09 08:29:42,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-09 08:29:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:29:42,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:42,117 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:42,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:42,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:42,337 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash -483995587, now seen corresponding path program 5 times [2021-11-09 08:29:42,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:42,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687995691] [2021-11-09 08:29:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:42,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 08:29:42,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:42,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687995691] [2021-11-09 08:29:42,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687995691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:42,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80754934] [2021-11-09 08:29:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:29:42,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:42,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:42,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:29:42,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:29:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:29:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-09 08:29:42,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80754934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:42,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:29:42,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2021-11-09 08:29:42,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260361676] [2021-11-09 08:29:42,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:29:42,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:29:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:29:42,750 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:42,806 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-11-09 08:29:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:29:42,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:29:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:42,807 INFO L225 Difference]: With dead ends: 80 [2021-11-09 08:29:42,807 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:29:42,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:29:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:29:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-11-09 08:29:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-09 08:29:42,818 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 45 [2021-11-09 08:29:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:42,818 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-09 08:29:42,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-09 08:29:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:29:42,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:42,820 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:42,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:43,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:43,037 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1464031703, now seen corresponding path program 6 times [2021-11-09 08:29:43,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:43,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732417701] [2021-11-09 08:29:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:43,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:29:43,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:43,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732417701] [2021-11-09 08:29:43,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732417701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:43,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261391228] [2021-11-09 08:29:43,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:29:43,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:43,161 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:43,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:29:43,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:29:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:29:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-09 08:29:43,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261391228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:43,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:43,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-09 08:29:43,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884132051] [2021-11-09 08:29:43,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:29:43,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:29:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:29:43,582 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:43,730 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2021-11-09 08:29:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:29:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:29:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:43,731 INFO L225 Difference]: With dead ends: 84 [2021-11-09 08:29:43,731 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 08:29:43,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:29:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 08:29:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-09 08:29:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-11-09 08:29:43,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 48 [2021-11-09 08:29:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:43,739 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-11-09 08:29:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-11-09 08:29:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:29:43,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:43,741 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:43,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:43,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:43,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1988798461, now seen corresponding path program 7 times [2021-11-09 08:29:43,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:43,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101224231] [2021-11-09 08:29:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:43,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-09 08:29:44,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101224231] [2021-11-09 08:29:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101224231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169721067] [2021-11-09 08:29:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:29:44,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:44,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:29:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:29:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-09 08:29:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169721067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:44,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:44,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-09 08:29:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353806119] [2021-11-09 08:29:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:29:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:29:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:29:44,395 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:44,649 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2021-11-09 08:29:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:29:44,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 08:29:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:44,653 INFO L225 Difference]: With dead ends: 133 [2021-11-09 08:29:44,653 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 08:29:44,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:29:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 08:29:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2021-11-09 08:29:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-11-09 08:29:44,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 51 [2021-11-09 08:29:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:44,676 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-11-09 08:29:44,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-11-09 08:29:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:29:44,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:44,679 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:44,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:44,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:29:44,880 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:44,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1926489495, now seen corresponding path program 8 times [2021-11-09 08:29:44,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:44,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288112357] [2021-11-09 08:29:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:44,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:29:45,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:45,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288112357] [2021-11-09 08:29:45,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288112357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:45,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201274207] [2021-11-09 08:29:45,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:29:45,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:45,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:45,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:29:45,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:29:45,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:29:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-09 08:29:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201274207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:45,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:45,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-09 08:29:45,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125513920] [2021-11-09 08:29:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:29:45,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:29:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:29:45,490 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:45,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:45,647 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2021-11-09 08:29:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 08:29:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 08:29:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:45,654 INFO L225 Difference]: With dead ends: 93 [2021-11-09 08:29:45,655 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 08:29:45,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:29:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 08:29:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-11-09 08:29:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-09 08:29:45,672 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 56 [2021-11-09 08:29:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:45,673 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-09 08:29:45,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-09 08:29:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:29:45,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:45,675 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:45,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:45,889 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:45,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1118322939, now seen corresponding path program 9 times [2021-11-09 08:29:45,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:45,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807125563] [2021-11-09 08:29:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:45,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 82 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-09 08:29:45,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:45,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807125563] [2021-11-09 08:29:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807125563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:45,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155599913] [2021-11-09 08:29:45,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:29:45,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:45,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:29:46,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:29:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:29:46,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:29:46,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:46,328 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:29:46,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:29:46,553 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:29:46,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:29:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:46,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:29:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:46,791 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:46,883 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:46,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:46,974 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:46,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:47,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:47,131 INFO L354 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2021-11-09 08:29:47,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 08:29:47,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:47,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:29:47,671 INFO L354 Elim1Store]: treesize reduction 117, result has 2.5 percent of original size [2021-11-09 08:29:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 34 [2021-11-09 08:29:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-09 08:29:47,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155599913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:47,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:29:47,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 18 [2021-11-09 08:29:47,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317158643] [2021-11-09 08:29:47,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:29:47,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:29:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:29:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:29:47,830 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:29:51,134 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2021-11-09 08:29:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:29:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2021-11-09 08:29:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:29:51,136 INFO L225 Difference]: With dead ends: 122 [2021-11-09 08:29:51,136 INFO L226 Difference]: Without dead ends: 77 [2021-11-09 08:29:51,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:29:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-09 08:29:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-09 08:29:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-11-09 08:29:51,149 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 59 [2021-11-09 08:29:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:29:51,149 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-11-09 08:29:51,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:29:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-11-09 08:29:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:29:51,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:51,151 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:51,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:29:51,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:29:51,370 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:29:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash 539933349, now seen corresponding path program 1 times [2021-11-09 08:29:51,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:51,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501352110] [2021-11-09 08:29:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:51,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 126 proven. 34 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-09 08:29:52,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:29:52,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501352110] [2021-11-09 08:29:52,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501352110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:29:52,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761894860] [2021-11-09 08:29:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:52,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:29:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:52,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:29:52,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:29:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:52,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:29:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:52,543 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:29:52,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:29:52,765 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:29:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:29:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:29:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:52,998 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:52,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:53,124 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:53,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:53,238 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:29:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:29:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:29:53,369 INFO L354 Elim1Store]: treesize reduction 140, result has 16.7 percent of original size [2021-11-09 08:29:53,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 08:30:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:30:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:30:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:30:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:30:12,942 INFO L354 Elim1Store]: treesize reduction 376, result has 6.5 percent of original size [2021-11-09 08:30:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 86 treesize of output 84 [2021-11-09 08:30:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:30:25,891 INFO L354 Elim1Store]: treesize reduction 117, result has 2.5 percent of original size [2021-11-09 08:30:25,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 26 [2021-11-09 08:30:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 121 proven. 74 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 08:30:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761894860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:26,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-11-09 08:30:26,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145311592] [2021-11-09 08:30:26,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:30:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:30:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1020, Unknown=2, NotChecked=0, Total=1122 [2021-11-09 08:30:26,012 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:30:48,501 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-11-09 08:30:56,644 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-11-09 08:31:08,819 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-11-09 08:31:31,258 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-11-09 08:31:41,495 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-11-09 08:31:55,761 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-11-09 08:32:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:44,995 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2021-11-09 08:32:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:32:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:32:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:44,997 INFO L225 Difference]: With dead ends: 145 [2021-11-09 08:32:44,998 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 08:32:45,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 127.3s TimeCoverageRelationStatistics Valid=449, Invalid=2735, Unknown=8, NotChecked=0, Total=3192 [2021-11-09 08:32:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 08:32:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-11-09 08:32:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2021-11-09 08:32:45,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 69 [2021-11-09 08:32:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2021-11-09 08:32:45,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:32:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2021-11-09 08:32:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:32:45,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:45,027 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:45,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:45,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:32:45,245 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:32:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1199464871, now seen corresponding path program 2 times [2021-11-09 08:32:45,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:45,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114607311] [2021-11-09 08:32:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:45,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-09 08:32:45,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:45,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114607311] [2021-11-09 08:32:45,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114607311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:45,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679876622] [2021-11-09 08:32:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:32:45,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:45,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:45,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:32:46,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:32:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:32:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:32:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:46,288 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:32:46,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:32:46,521 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:32:46,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:32:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:32:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:46,716 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:32:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:32:46,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:46,826 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:32:46,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:32:46,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:46,920 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:32:46,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 48 [2021-11-09 08:32:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:32:47,039 INFO L354 Elim1Store]: treesize reduction 140, result has 16.7 percent of original size [2021-11-09 08:32:47,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 08:33:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:06,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:06,472 INFO L354 Elim1Store]: treesize reduction 376, result has 6.5 percent of original size [2021-11-09 08:33:06,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 86 treesize of output 84 [2021-11-09 08:33:19,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:19,309 INFO L354 Elim1Store]: treesize reduction 117, result has 2.5 percent of original size [2021-11-09 08:33:19,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 26 [2021-11-09 08:33:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 121 proven. 74 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-09 08:33:19,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679876622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:19,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:19,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 28 [2021-11-09 08:33:19,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578913758] [2021-11-09 08:33:19,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:33:19,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:33:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=726, Unknown=2, NotChecked=0, Total=812 [2021-11-09 08:33:19,414 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:42,029 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-11-09 08:34:13,093 WARN L207 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-11-09 08:34:21,252 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-11-09 08:34:33,397 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-11-09 08:34:47,653 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-11-09 08:37:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:40,861 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2021-11-09 08:37:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:37:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:37:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:40,864 INFO L225 Difference]: With dead ends: 162 [2021-11-09 08:37:40,864 INFO L226 Difference]: Without dead ends: 115 [2021-11-09 08:37:40,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 193.0s TimeCoverageRelationStatistics Valid=466, Invalid=2581, Unknown=33, NotChecked=0, Total=3080 [2021-11-09 08:37:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-09 08:37:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2021-11-09 08:37:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.233009708737864) internal successors, (127), 103 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2021-11-09 08:37:40,908 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 69 [2021-11-09 08:37:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:40,908 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2021-11-09 08:37:40,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2021-11-09 08:37:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:37:40,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:40,910 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:40,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:41,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:37:41,121 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -849922971, now seen corresponding path program 3 times [2021-11-09 08:37:41,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:41,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457510435] [2021-11-09 08:37:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:41,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 115 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 08:37:42,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:42,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457510435] [2021-11-09 08:37:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457510435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:42,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739192867] [2021-11-09 08:37:42,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:42,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:42,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:42,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:37:43,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:37:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:37:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:43,315 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:37:43,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:37:43,602 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:37:43,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:37:43,742 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:37:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-09 08:37:43,872 INFO L354 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2021-11-09 08:37:43,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 08:37:44,005 INFO L354 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2021-11-09 08:37:44,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 08:37:44,124 INFO L354 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2021-11-09 08:37:44,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 08:37:44,298 INFO L354 Elim1Store]: treesize reduction 160, result has 15.8 percent of original size [2021-11-09 08:37:44,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 54 [2021-11-09 08:38:01,125 INFO L354 Elim1Store]: treesize reduction 148, result has 12.4 percent of original size [2021-11-09 08:38:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 46 [2021-11-09 08:38:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 60 proven. 11 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-09 08:38:01,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739192867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:01,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:01,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 29 [2021-11-09 08:38:01,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392577333] [2021-11-09 08:38:01,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:38:01,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:38:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=780, Unknown=2, NotChecked=0, Total=870 [2021-11-09 08:38:01,310 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:52,767 INFO L93 Difference]: Finished difference Result 204 states and 253 transitions. [2021-11-09 08:39:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:39:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:39:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:52,768 INFO L225 Difference]: With dead ends: 204 [2021-11-09 08:39:52,768 INFO L226 Difference]: Without dead ends: 126 [2021-11-09 08:39:52,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=424, Invalid=2535, Unknown=11, NotChecked=0, Total=2970 [2021-11-09 08:39:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-09 08:39:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-09 08:39:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 115 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 140 transitions. [2021-11-09 08:39:52,789 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 140 transitions. Word has length 69 [2021-11-09 08:39:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:52,790 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 140 transitions. [2021-11-09 08:39:52,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 140 transitions. [2021-11-09 08:39:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:39:52,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:52,791 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:52,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:53,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:39:53,006 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:53,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1465016735, now seen corresponding path program 4 times [2021-11-09 08:39:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:53,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165246773] [2021-11-09 08:39:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 92 proven. 129 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-09 08:39:54,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:54,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165246773] [2021-11-09 08:39:54,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165246773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:54,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981150401] [2021-11-09 08:39:54,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:39:54,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:54,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:54,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:39:54,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:39:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 08:39:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:54,857 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:54,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2021-11-09 08:39:55,220 INFO L354 Elim1Store]: treesize reduction 182, result has 11.7 percent of original size [2021-11-09 08:39:55,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 42 [2021-11-09 08:39:55,575 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-11-09 08:39:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 29 [2021-11-09 08:39:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 90 proven. 123 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:39:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981150401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:55,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:55,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-11-09 08:39:55,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094458347] [2021-11-09 08:39:55,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:39:55,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:39:55,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:39:55,682 INFO L87 Difference]: Start difference. First operand 116 states and 140 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 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) [2021-11-09 08:39:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:57,705 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2021-11-09 08:39:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:39:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 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 69 [2021-11-09 08:39:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:57,707 INFO L225 Difference]: With dead ends: 206 [2021-11-09 08:39:57,707 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 08:39:57,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=413, Invalid=4143, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:39:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 08:39:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2021-11-09 08:39:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.2450331125827814) internal successors, (188), 151 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2021-11-09 08:39:57,728 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 69 [2021-11-09 08:39:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:57,728 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2021-11-09 08:39:57,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 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) [2021-11-09 08:39:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2021-11-09 08:39:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:39:57,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:57,729 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:57,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-09 08:39:57,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:39:57,930 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash -629403355, now seen corresponding path program 5 times [2021-11-09 08:39:57,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:57,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681155559] [2021-11-09 08:39:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:57,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-09 08:39:58,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:58,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681155559] [2021-11-09 08:39:58,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681155559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:58,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756563400] [2021-11-09 08:39:58,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:39:58,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:58,679 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:58,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:39:59,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-09 08:39:59,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:39:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:59,572 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:59,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2021-11-09 08:39:59,810 INFO L354 Elim1Store]: treesize reduction 182, result has 11.7 percent of original size [2021-11-09 08:39:59,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 42 [2021-11-09 08:39:59,934 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:39:59,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 10 [2021-11-09 08:39:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 146 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-09 08:39:59,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756563400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:59,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:59,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 31 [2021-11-09 08:39:59,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152047288] [2021-11-09 08:39:59,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:39:59,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:39:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:39:59,993 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:02,881 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2021-11-09 08:40:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 08:40:02,882 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:40:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:02,883 INFO L225 Difference]: With dead ends: 306 [2021-11-09 08:40:02,883 INFO L226 Difference]: Without dead ends: 194 [2021-11-09 08:40:02,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=634, Invalid=6008, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 08:40:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-09 08:40:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 123. [2021-11-09 08:40:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 122 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-11-09 08:40:02,909 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 69 [2021-11-09 08:40:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:02,910 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-11-09 08:40:02,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-11-09 08:40:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:40:02,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:02,911 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:02,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:03,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:40:03,117 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash 55778855, now seen corresponding path program 6 times [2021-11-09 08:40:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:03,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268210363] [2021-11-09 08:40:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:03,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 90 proven. 132 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-09 08:40:04,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:04,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268210363] [2021-11-09 08:40:04,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268210363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:04,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296989816] [2021-11-09 08:40:04,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:40:04,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:04,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:04,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:40:05,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-09 08:40:05,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:40:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:05,501 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:40:05,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:40:05,667 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:40:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:40:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:06,267 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-09 08:40:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2021-11-09 08:40:06,547 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-09 08:40:06,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2021-11-09 08:40:06,741 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-09 08:40:06,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2021-11-09 08:40:06,964 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-09 08:40:06,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 51 [2021-11-09 08:40:07,079 INFO L354 Elim1Store]: treesize reduction 150, result has 17.1 percent of original size [2021-11-09 08:40:07,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 55 [2021-11-09 08:40:07,275 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-09 08:40:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 32 [2021-11-09 08:40:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-09 08:40:07,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296989816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:07,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:07,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2021-11-09 08:40:07,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315077854] [2021-11-09 08:40:07,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:40:07,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:40:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:40:07,316 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:10,429 INFO L93 Difference]: Finished difference Result 194 states and 241 transitions. [2021-11-09 08:40:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:40:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-09 08:40:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:10,430 INFO L225 Difference]: With dead ends: 194 [2021-11-09 08:40:10,430 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 08:40:10,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=501, Invalid=3159, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:40:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 08:40:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2021-11-09 08:40:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2021-11-09 08:40:10,450 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 69 [2021-11-09 08:40:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:10,451 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2021-11-09 08:40:10,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2021-11-09 08:40:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 08:40:10,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:10,452 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:10,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-09 08:40:10,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:10,657 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1391722497, now seen corresponding path program 1 times [2021-11-09 08:40:10,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:10,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705608342] [2021-11-09 08:40:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:10,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 08:40:11,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705608342] [2021-11-09 08:40:11,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705608342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:11,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101026994] [2021-11-09 08:40:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:11,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:11,206 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:11,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:40:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:40:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:11,858 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:40:11,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:40:12,000 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:40:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:40:12,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:12,291 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 08:40:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:40:12,714 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:12,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 60 [2021-11-09 08:40:12,965 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:12,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 60 [2021-11-09 08:40:13,191 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:13,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 60 [2021-11-09 08:40:13,388 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:13,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 60 [2021-11-09 08:40:13,550 INFO L354 Elim1Store]: treesize reduction 270, result has 12.9 percent of original size [2021-11-09 08:40:13,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 64 [2021-11-09 08:40:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 08:40:13,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101026994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:13,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:13,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-09 08:40:13,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601835700] [2021-11-09 08:40:13,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:40:13,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:40:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:40:13,833 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:15,404 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-11-09 08:40:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:40:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-09 08:40:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:15,405 INFO L225 Difference]: With dead ends: 126 [2021-11-09 08:40:15,405 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 08:40:15,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:40:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 08:40:15,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2021-11-09 08:40:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.203883495145631) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-11-09 08:40:15,426 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 73 [2021-11-09 08:40:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:15,427 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-11-09 08:40:15,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-11-09 08:40:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 08:40:15,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:15,428 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:15,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:15,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:15,649 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1040216297, now seen corresponding path program 2 times [2021-11-09 08:40:15,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:15,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700927513] [2021-11-09 08:40:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:15,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 08:40:16,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:16,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700927513] [2021-11-09 08:40:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700927513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:16,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991461985] [2021-11-09 08:40:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:16,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:16,241 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:40:16,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:40:16,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:40:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:17,024 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:40:17,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:40:17,183 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:40:17,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:40:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:17,428 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 08:40:17,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-09 08:40:17,591 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-09 08:40:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-09 08:40:18,604 INFO L354 Elim1Store]: treesize reduction 73, result has 20.7 percent of original size [2021-11-09 08:40:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 79 [2021-11-09 08:40:19,308 INFO L354 Elim1Store]: treesize reduction 73, result has 20.7 percent of original size [2021-11-09 08:40:19,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 79 [2021-11-09 08:40:19,851 INFO L354 Elim1Store]: treesize reduction 73, result has 20.7 percent of original size [2021-11-09 08:40:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 79 [2021-11-09 08:40:20,181 INFO L354 Elim1Store]: treesize reduction 73, result has 20.7 percent of original size [2021-11-09 08:40:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 79 [2021-11-09 08:40:20,455 INFO L354 Elim1Store]: treesize reduction 422, result has 10.8 percent of original size [2021-11-09 08:40:20,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 83 [2021-11-09 08:40:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 08:40:21,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991461985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:21,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:21,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-11-09 08:40:21,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674305596] [2021-11-09 08:40:21,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:40:21,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:40:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:40:21,047 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:23,171 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-11-09 08:40:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:40:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 08:40:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:23,173 INFO L225 Difference]: With dead ends: 124 [2021-11-09 08:40:23,173 INFO L226 Difference]: Without dead ends: 122 [2021-11-09 08:40:23,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=408, Invalid=2244, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 08:40:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-09 08:40:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2021-11-09 08:40:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 107 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2021-11-09 08:40:23,201 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 77 [2021-11-09 08:40:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:23,201 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2021-11-09 08:40:23,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2021-11-09 08:40:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 08:40:23,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:23,203 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:23,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:23,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 08:40:23,417 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1813929171, now seen corresponding path program 3 times [2021-11-09 08:40:23,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:23,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976794482] [2021-11-09 08:40:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:23,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 08:40:24,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:24,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976794482] [2021-11-09 08:40:24,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976794482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:24,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469802985] [2021-11-09 08:40:24,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:40:24,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:24,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:24,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:40:25,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 08:40:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:25,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 08:40:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:25,260 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-09 08:40:25,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-09 08:40:25,427 INFO L354 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2021-11-09 08:40:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 36 treesize of output 62 [2021-11-09 08:40:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:25,700 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-09 08:40:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:40:25,840 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-09 08:40:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-09 08:40:26,109 INFO L354 Elim1Store]: treesize reduction 146, result has 18.0 percent of original size [2021-11-09 08:40:26,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 60 [2021-11-09 08:40:26,928 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 60 [2021-11-09 08:40:27,725 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:27,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 70 [2021-11-09 08:40:28,257 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:28,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 70 [2021-11-09 08:40:28,794 INFO L354 Elim1Store]: treesize reduction 43, result has 30.6 percent of original size [2021-11-09 08:40:28,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 68 [2021-11-09 08:40:29,112 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-11-09 08:40:29,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2021-11-09 08:40:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 103 proven. 79 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-09 08:40:29,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469802985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:29,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:29,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29] total 43 [2021-11-09 08:40:29,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197399129] [2021-11-09 08:40:29,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:40:29,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:40:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:40:29,866 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:35,802 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2021-11-09 08:40:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 08:40:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 08:40:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:35,805 INFO L225 Difference]: With dead ends: 210 [2021-11-09 08:40:35,806 INFO L226 Difference]: Without dead ends: 208 [2021-11-09 08:40:35,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2165 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1222, Invalid=6434, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 08:40:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-09 08:40:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 112. [2021-11-09 08:40:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 111 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2021-11-09 08:40:35,831 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 81 [2021-11-09 08:40:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2021-11-09 08:40:35,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2021-11-09 08:40:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:40:35,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:35,832 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:35,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:40:36,037 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1076904893, now seen corresponding path program 4 times [2021-11-09 08:40:36,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:36,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270260101] [2021-11-09 08:40:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:36,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 94 proven. 15 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-11-09 08:40:36,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:36,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270260101] [2021-11-09 08:40:36,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270260101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:36,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541854228] [2021-11-09 08:40:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:40:36,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:36,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:36,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d97c21a-b718-43b7-9e73-37253d8ca5c4/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:40:37,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:40:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-09 08:40:37,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:37,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 08:40:37,956 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:40:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-11-09 08:40:38,057 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 08:40:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-09 08:40:38,168 INFO L354 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2021-11-09 08:40:38,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 08:40:38,325 INFO L354 Elim1Store]: treesize reduction 264, result has 15.7 percent of original size [2021-11-09 08:40:38,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 80 [2021-11-09 08:40:40,378 INFO L354 Elim1Store]: treesize reduction 862, result has 34.5 percent of original size [2021-11-09 08:40:40,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 137 treesize of output 501