./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/eureka_01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G --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 fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:46:06,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:46:06,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:46:06,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:46:06,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:46:06,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:46:06,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:46:06,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:46:06,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:46:06,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:46:06,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:46:06,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:46:06,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:46:06,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:46:06,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:46:06,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:46:06,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:46:06,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:46:06,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:46:06,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:46:07,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:46:07,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:46:07,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:46:07,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:46:07,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:46:07,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:46:07,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:46:07,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:46:07,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:46:07,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:46:07,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:46:07,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:46:07,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:46:07,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:46:07,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:46:07,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:46:07,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:46:07,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:46:07,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:46:07,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:46:07,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:46:07,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:46:07,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:46:07,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:46:07,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:46:07,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:46:07,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:46:07,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:46:07,059 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:46:07,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:46:07,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:46:07,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:46:07,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:46:07,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:46:07,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:46:07,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:46:07,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:46:07,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:46:07,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:46:07,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:46:07,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:46:07,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:46:07,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:46:07,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:46:07,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:46:07,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:46:07,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:46:07,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:46:07,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:46:07,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:46:07,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:46:07,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:46:07,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:46:07,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:46:07,065 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_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 [2021-11-23 13:46:07,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:46:07,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:46:07,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:46:07,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:46:07,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:46:07,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/loops/eureka_01-2.c [2021-11-23 13:46:07,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/data/881f49eb5/401f8187a74e40d28d405a9b0013cac4/FLAG6b51ec5b7 [2021-11-23 13:46:08,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:46:08,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/sv-benchmarks/c/loops/eureka_01-2.c [2021-11-23 13:46:08,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/data/881f49eb5/401f8187a74e40d28d405a9b0013cac4/FLAG6b51ec5b7 [2021-11-23 13:46:08,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/data/881f49eb5/401f8187a74e40d28d405a9b0013cac4 [2021-11-23 13:46:08,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:46:08,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:46:08,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:46:08,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:46:08,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:46:08,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f58c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08, skipping insertion in model container [2021-11-23 13:46:08,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:46:08,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:46:08,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2021-11-23 13:46:08,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:46:08,579 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:46:08,590 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/sv-benchmarks/c/loops/eureka_01-2.c[323,336] [2021-11-23 13:46:08,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:46:08,628 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:46:08,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08 WrapperNode [2021-11-23 13:46:08,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:46:08,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:46:08,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:46:08,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:46:08,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,683 INFO L137 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2021-11-23 13:46:08,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:46:08,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:46:08,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:46:08,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:46:08,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:46:08,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:46:08,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:46:08,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:46:08,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (1/1) ... [2021-11-23 13:46:08,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:46:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:08,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:46:08,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:46:08,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:46:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:46:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:46:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:46:08,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:46:08,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:46:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:46:08,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:46:08,902 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:46:08,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:46:09,142 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:46:09,148 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:46:09,148 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 13:46:09,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:09 BoogieIcfgContainer [2021-11-23 13:46:09,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:46:09,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:46:09,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:46:09,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:46:09,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:46:08" (1/3) ... [2021-11-23 13:46:09,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673688e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:09, skipping insertion in model container [2021-11-23 13:46:09,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:08" (2/3) ... [2021-11-23 13:46:09,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673688e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:09, skipping insertion in model container [2021-11-23 13:46:09,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:09" (3/3) ... [2021-11-23 13:46:09,173 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2021-11-23 13:46:09,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:46:09,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:46:09,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:46:09,245 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 [2021-11-23 13:46:09,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:46:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:46:09,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:09,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:09,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2021-11-23 13:46:09,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:09,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460678603] [2021-11-23 13:46:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:09,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:09,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:09,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460678603] [2021-11-23 13:46:09,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460678603] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:09,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:09,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:46:09,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303639347] [2021-11-23 13:46:09,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:09,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:46:09,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:46:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:46:09,593 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-23 13:46:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:09,619 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-11-23 13:46:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:46:09,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-11-23 13:46:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:09,630 INFO L225 Difference]: With dead ends: 47 [2021-11-23 13:46:09,631 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 13:46:09,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:46:09,638 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:09,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 13:46:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-23 13:46:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-23 13:46:09,678 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2021-11-23 13:46:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:09,679 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-23 13:46:09,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-23 13:46:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-23 13:46:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:46:09,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:09,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:46:09,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2021-11-23 13:46:09,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413097740] [2021-11-23 13:46:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:09,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:46:09,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:09,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413097740] [2021-11-23 13:46:09,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413097740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:09,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:09,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:46:09,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518226481] [2021-11-23 13:46:09,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:09,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:46:09,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:46:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:46:09,869 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-11-23 13:46:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:09,922 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-23 13:46:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:46:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 11 [2021-11-23 13:46:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:09,924 INFO L225 Difference]: With dead ends: 42 [2021-11-23 13:46:09,924 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 13:46:09,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:46:09,934 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:09,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 13:46:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-23 13:46:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-11-23 13:46:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-23 13:46:09,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2021-11-23 13:46:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:09,948 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-23 13:46:09,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-11-23 13:46:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-23 13:46:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:46:09,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:09,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:09,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:46:09,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2021-11-23 13:46:09,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079758900] [2021-11-23 13:46:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:46:10,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:10,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079758900] [2021-11-23 13:46:10,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079758900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:10,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:10,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:46:10,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997115576] [2021-11-23 13:46:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:10,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:46:10,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:46:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,114 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:10,166 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-23 13:46:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:46:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:46:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:10,168 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:46:10,168 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 13:46:10,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,170 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:10,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 13:46:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-11-23 13:46:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-23 13:46:10,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2021-11-23 13:46:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:10,177 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-23 13:46:10,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-23 13:46:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:46:10,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:10,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:10,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:46:10,179 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:10,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2021-11-23 13:46:10,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:10,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860984842] [2021-11-23 13:46:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:10,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:46:10,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860984842] [2021-11-23 13:46:10,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860984842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:10,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:10,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:46:10,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066134947] [2021-11-23 13:46:10,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:10,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:46:10,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:46:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,238 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:10,266 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-11-23 13:46:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:46:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2021-11-23 13:46:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:10,268 INFO L225 Difference]: With dead ends: 43 [2021-11-23 13:46:10,268 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:46:10,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,270 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:46:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-23 13:46:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2021-11-23 13:46:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-23 13:46:10,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2021-11-23 13:46:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:10,277 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-23 13:46:10,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-23 13:46:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:46:10,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:10,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:10,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:46:10,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2021-11-23 13:46:10,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:10,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517097161] [2021-11-23 13:46:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:10,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:10,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:10,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517097161] [2021-11-23 13:46:10,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517097161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:10,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:46:10,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:46:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435437681] [2021-11-23 13:46:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:46:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:46:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,339 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:10,394 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-23 13:46:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:46:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:46:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:10,395 INFO L225 Difference]: With dead ends: 48 [2021-11-23 13:46:10,395 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 13:46:10,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:46:10,397 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:10,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 13:46:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-11-23 13:46:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-23 13:46:10,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-11-23 13:46:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:10,405 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-23 13:46:10,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-23 13:46:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:46:10,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:10,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:10,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:46:10,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2021-11-23 13:46:10,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662409899] [2021-11-23 13:46:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:10,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:10,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:10,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662409899] [2021-11-23 13:46:10,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662409899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:10,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543876428] [2021-11-23 13:46:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:10,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:10,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:10,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:10,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:46:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:46:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:10,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:10,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543876428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:10,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:10,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 13:46:10,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273776645] [2021-11-23 13:46:10,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:46:10,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:46:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:46:10,843 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:10,928 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-23 13:46:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:46:10,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:46:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:10,929 INFO L225 Difference]: With dead ends: 55 [2021-11-23 13:46:10,929 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 13:46:10,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:46:10,936 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:10,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:46:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 13:46:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 13:46:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 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) [2021-11-23 13:46:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-11-23 13:46:10,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2021-11-23 13:46:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:10,951 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-11-23 13:46:10,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-11-23 13:46:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 13:46:10,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:10,953 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:10,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:11,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:11,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:11,181 INFO L85 PathProgramCache]: Analyzing trace with hash 55827240, now seen corresponding path program 2 times [2021-11-23 13:46:11,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762413256] [2021-11-23 13:46:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:11,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:46:11,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762413256] [2021-11-23 13:46:11,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762413256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177644024] [2021-11-23 13:46:11,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:46:11,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:11,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:46:11,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:46:11,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:46:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:46:11,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:46:11,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177644024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:46:11,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:46:11,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 13:46:11,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288556623] [2021-11-23 13:46:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:46:11,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:46:11,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:46:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:11,507 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:11,563 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-11-23 13:46:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:46:11,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 13:46:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:11,569 INFO L225 Difference]: With dead ends: 76 [2021-11-23 13:46:11,569 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 13:46:11,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:46:11,572 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:11,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 13:46:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2021-11-23 13:46:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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) [2021-11-23 13:46:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-23 13:46:11,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2021-11-23 13:46:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-23 13:46:11,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-23 13:46:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 13:46:11,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:11,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:11,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:11,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 13:46:11,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 1 times [2021-11-23 13:46:11,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150587933] [2021-11-23 13:46:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:11,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:11,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150587933] [2021-11-23 13:46:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150587933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693786354] [2021-11-23 13:46:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:11,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:11,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:11,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:46:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:46:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:12,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:46:12,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693786354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:12,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-23 13:46:12,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456913712] [2021-11-23 13:46:12,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:12,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:46:12,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:46:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:46:12,350 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:12,452 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-11-23 13:46:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:46:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-23 13:46:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:12,453 INFO L225 Difference]: With dead ends: 60 [2021-11-23 13:46:12,453 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 13:46:12,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:46:12,455 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:12,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:46:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 13:46:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-23 13:46:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 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) [2021-11-23 13:46:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-23 13:46:12,467 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2021-11-23 13:46:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-23 13:46:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-23 13:46:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 13:46:12,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:12,474 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:12,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:12,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:12,693 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530160, now seen corresponding path program 2 times [2021-11-23 13:46:12,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:12,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860955480] [2021-11-23 13:46:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:12,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:46:12,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860955480] [2021-11-23 13:46:12,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860955480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076497056] [2021-11-23 13:46:12,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:46:12,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:12,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:12,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:46:12,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:46:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:46:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:46:12,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:46:13,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076497056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:13,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:13,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-23 13:46:13,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438631431] [2021-11-23 13:46:13,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:13,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 13:46:13,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 13:46:13,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:46:13,067 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:13,133 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2021-11-23 13:46:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:46:13,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-23 13:46:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:13,135 INFO L225 Difference]: With dead ends: 65 [2021-11-23 13:46:13,135 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 13:46:13,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:46:13,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:13,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:46:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 13:46:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 13:46:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-11-23 13:46:13,143 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2021-11-23 13:46:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:13,143 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-11-23 13:46:13,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-11-23 13:46:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 13:46:13,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:13,144 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:13,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:13,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:13,360 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1632294897, now seen corresponding path program 3 times [2021-11-23 13:46:13,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:13,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742605953] [2021-11-23 13:46:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:13,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:46:13,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:13,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742605953] [2021-11-23 13:46:13,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742605953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475459966] [2021-11-23 13:46:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:46:13,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:13,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:46:13,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:46:13,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:46:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 13:46:13,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 13:46:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475459966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:13,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:13,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2021-11-23 13:46:13,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208528802] [2021-11-23 13:46:13,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:46:13,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:46:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:46:13,881 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 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) [2021-11-23 13:46:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:14,418 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2021-11-23 13:46:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:46:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 13:46:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:14,420 INFO L225 Difference]: With dead ends: 171 [2021-11-23 13:46:14,420 INFO L226 Difference]: Without dead ends: 144 [2021-11-23 13:46:14,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=506, Invalid=976, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:46:14,422 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 391 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:14,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 50 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:46:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-23 13:46:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2021-11-23 13:46:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2021-11-23 13:46:14,434 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 44 [2021-11-23 13:46:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:14,435 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2021-11-23 13:46:14,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 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) [2021-11-23 13:46:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2021-11-23 13:46:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 13:46:14,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:14,437 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:14,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:14,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:46:14,653 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash -919071665, now seen corresponding path program 4 times [2021-11-23 13:46:14,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:14,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983419324] [2021-11-23 13:46:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:14,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-11-23 13:46:14,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983419324] [2021-11-23 13:46:14,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983419324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331981573] [2021-11-23 13:46:14,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:46:14,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:14,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:14,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:46:14,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:46:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 13:46:15,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-23 13:46:15,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-23 13:46:15,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331981573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:46:15,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:46:15,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2021-11-23 13:46:15,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786242516] [2021-11-23 13:46:15,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:15,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 13:46:15,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 13:46:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:46:15,495 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:16,709 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2021-11-23 13:46:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-23 13:46:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-23 13:46:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:16,711 INFO L225 Difference]: With dead ends: 322 [2021-11-23 13:46:16,711 INFO L226 Difference]: Without dead ends: 251 [2021-11-23 13:46:16,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1362, Invalid=4644, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 13:46:16,715 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 957 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:16,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 123 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:46:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-23 13:46:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 131. [2021-11-23 13:46:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2021-11-23 13:46:16,732 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 104 [2021-11-23 13:46:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:16,732 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2021-11-23 13:46:16,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:46:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2021-11-23 13:46:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 13:46:16,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:16,735 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:16,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:16,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:16,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 964759091, now seen corresponding path program 5 times [2021-11-23 13:46:16,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581344081] [2021-11-23 13:46:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:16,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-23 13:46:17,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:17,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581344081] [2021-11-23 13:46:17,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581344081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904537997] [2021-11-23 13:46:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:46:17,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:17,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:17,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:52:53,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-23 13:52:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:52:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:52:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:52:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-23 13:52:54,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:52:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-23 13:52:54,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904537997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:52:54,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:52:54,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-23 13:52:54,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5477509] [2021-11-23 13:52:54,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:52:54,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:52:54,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:52:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:52:54,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:52:54,536 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:52:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:52:54,768 INFO L93 Difference]: Finished difference Result 319 states and 438 transitions. [2021-11-23 13:52:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:52:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-23 13:52:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:52:54,770 INFO L225 Difference]: With dead ends: 319 [2021-11-23 13:52:54,771 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 13:52:54,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=647, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 13:52:54,773 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 164 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:52:54,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 115 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:52:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 13:52:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-11-23 13:52:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2876106194690264) internal successors, (291), 226 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:52:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2021-11-23 13:52:54,796 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 128 [2021-11-23 13:52:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:52:54,797 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2021-11-23 13:52:54,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:52:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2021-11-23 13:52:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 13:52:54,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:52:54,801 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:52:54,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:52:55,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:52:55,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:52:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:52:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash 649548339, now seen corresponding path program 6 times [2021-11-23 13:52:55,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:52:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139688635] [2021-11-23 13:52:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:52:55,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:52:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:52:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2810 trivial. 0 not checked. [2021-11-23 13:52:55,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:52:55,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139688635] [2021-11-23 13:52:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139688635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:52:55,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612357956] [2021-11-23 13:52:55,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:52:55,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:52:55,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:52:55,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:52:55,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:52:58,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 13:52:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:52:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 13:52:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:52:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2021-11-23 13:52:59,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:52:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4952 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2021-11-23 13:52:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612357956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:52:59,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:52:59,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2021-11-23 13:52:59,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752798715] [2021-11-23 13:52:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:52:59,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 13:52:59,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:52:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 13:52:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 13:52:59,936 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:09,858 INFO L93 Difference]: Finished difference Result 1116 states and 1464 transitions. [2021-11-23 13:53:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2021-11-23 13:53:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-23 13:53:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:09,866 INFO L225 Difference]: With dead ends: 1116 [2021-11-23 13:53:09,866 INFO L226 Difference]: Without dead ends: 952 [2021-11-23 13:53:09,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25591 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=18859, Invalid=47447, Unknown=0, NotChecked=0, Total=66306 [2021-11-23 13:53:09,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3275 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3275 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:09,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3275 Valid, 131 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:53:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-23 13:53:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 263. [2021-11-23 13:53:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.2633587786259541) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2021-11-23 13:53:09,924 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 224 [2021-11-23 13:53:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:09,925 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2021-11-23 13:53:09,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2021-11-23 13:53:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-23 13:53:09,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:09,929 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:09,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:53:10,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 13:53:10,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1761221199, now seen corresponding path program 7 times [2021-11-23 13:53:10,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640526516] [2021-11-23 13:53:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:10,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-23 13:53:10,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640526516] [2021-11-23 13:53:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640526516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:53:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313102431] [2021-11-23 13:53:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:53:10,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:53:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:10,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:53:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:53:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:11,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:53:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:53:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-23 13:53:11,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:53:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5894 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3442 trivial. 0 not checked. [2021-11-23 13:53:12,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313102431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:53:12,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:53:12,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2021-11-23 13:53:12,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674303019] [2021-11-23 13:53:12,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:53:12,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 13:53:12,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 13:53:12,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=1694, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 13:53:12,652 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:12,919 INFO L93 Difference]: Finished difference Result 520 states and 678 transitions. [2021-11-23 13:53:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 13:53:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-23 13:53:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:12,922 INFO L225 Difference]: With dead ends: 520 [2021-11-23 13:53:12,922 INFO L226 Difference]: Without dead ends: 323 [2021-11-23 13:53:12,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:53:12,923 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 175 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:12,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 187 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-23 13:53:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-23 13:53:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2763975155279503) internal successors, (411), 322 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 411 transitions. [2021-11-23 13:53:12,947 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 411 transitions. Word has length 260 [2021-11-23 13:53:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:12,948 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 411 transitions. [2021-11-23 13:53:12,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.3773584905660377) internal successors, (179), 53 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 411 transitions. [2021-11-23 13:53:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-23 13:53:12,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:12,953 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 14, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:12,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:53:13,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:53:13,169 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1030632653, now seen corresponding path program 8 times [2021-11-23 13:53:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716191188] [2021-11-23 13:53:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:13,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-23 13:53:13,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716191188] [2021-11-23 13:53:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716191188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:53:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139066932] [2021-11-23 13:53:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:53:13,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:53:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:13,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:53:13,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:53:13,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:53:13,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:53:13,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:53:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:53:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-23 13:53:15,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:53:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2682 trivial. 0 not checked. [2021-11-23 13:53:15,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139066932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:53:15,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:53:15,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-23 13:53:15,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783302245] [2021-11-23 13:53:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:53:15,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 13:53:15,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:53:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 13:53:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:53:15,750 INFO L87 Difference]: Start difference. First operand 323 states and 411 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:53:15,895 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2021-11-23 13:53:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:53:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2021-11-23 13:53:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:53:15,898 INFO L225 Difference]: With dead ends: 462 [2021-11-23 13:53:15,899 INFO L226 Difference]: Without dead ends: 411 [2021-11-23 13:53:15,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 629 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:53:15,900 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:53:15,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 103 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:53:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-23 13:53:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 386. [2021-11-23 13:53:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.2857142857142858) internal successors, (495), 385 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 495 transitions. [2021-11-23 13:53:15,931 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 495 transitions. Word has length 320 [2021-11-23 13:53:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:53:15,932 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 495 transitions. [2021-11-23 13:53:15,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:53:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 495 transitions. [2021-11-23 13:53:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-23 13:53:15,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:53:15,940 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 14, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:53:15,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:53:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:53:16,165 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:53:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:53:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -974828135, now seen corresponding path program 9 times [2021-11-23 13:53:16,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:53:16,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541731573] [2021-11-23 13:53:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:53:16,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:53:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:53:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-23 13:53:16,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:53:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541731573] [2021-11-23 13:53:16,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541731573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:53:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224453229] [2021-11-23 13:53:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:53:16,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:53:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:53:16,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:53:16,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:53:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 13:53:17,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:53:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 13:53:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:53:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 13:53:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,191 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 13:53:18,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 58 [2021-11-23 13:53:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,434 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 13:53:18,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 66 [2021-11-23 13:53:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:18,661 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-23 13:53:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 66 treesize of output 86 [2021-11-23 13:53:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:19,068 INFO L354 Elim1Store]: treesize reduction 124, result has 26.2 percent of original size [2021-11-23 13:53:19,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 116 [2021-11-23 13:53:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:19,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:19,768 INFO L354 Elim1Store]: treesize reduction 169, result has 20.7 percent of original size [2021-11-23 13:53:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 115 treesize of output 133 [2021-11-23 13:53:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 13:53:22,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:22,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:53:22,744 INFO L354 Elim1Store]: treesize reduction 380, result has 25.8 percent of original size [2021-11-23 13:53:22,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 5 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 31 case distinctions, treesize of input 156 treesize of output 233 [2021-11-23 13:53:52,835 INFO L354 Elim1Store]: treesize reduction 912, result has 29.0 percent of original size [2021-11-23 13:53:52,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 1 disjoint index pairs (out of 120 index pairs), introduced 18 new quantified variables, introduced 120 case distinctions, treesize of input 499 treesize of output 607 [2021-11-23 13:54:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 509 proven. 34 refuted. 0 times theorem prover too weak. 15164 trivial. 0 not checked. [2021-11-23 13:54:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:54:24,543 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse0 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| .cse2)) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4 .cse2)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4))) |v_ULTIMATE.start_main_~x~0#1_420|))) is different from false [2021-11-23 13:54:26,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) is different from false [2021-11-23 13:54:43,236 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (let ((.cse2 (let ((.cse4 (* |ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0)))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse2))) (or (let ((.cse0 (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse3 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (< (select (select .cse3 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|))))) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~nodecount~0#1|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-11-23 13:54:45,501 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (let ((.cse3 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) c_~INFINITY~0)))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse3))) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)) (let ((.cse1 (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select .cse0 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)))))))))) is different from false [2021-11-23 13:54:47,912 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int) (|v_ULTIMATE.start_main_~i~0#1_214| Int) (~INFINITY~0 Int)) (let ((.cse3 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ (* |v_ULTIMATE.start_main_~i~0#1_214| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0)))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse3))) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse1 (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)))))) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)))))) is different from false [2021-11-23 13:54:50,311 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_212| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int) (|v_ULTIMATE.start_main_~i~0#1_214| Int) (~INFINITY~0 Int)) (let ((.cse2 (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_212| 4))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ (* |v_ULTIMATE.start_main_~i~0#1_214| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0) (+ .cse4 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|) ~INFINITY~0)))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse2))) (or (let ((.cse0 (store .cse2 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select .cse2 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (select (select .cse3 |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_212|) |c_ULTIMATE.start_main_~nodecount~0#1|) (< (select (select .cse3 |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (<= |c_ULTIMATE.start_main_~nodecount~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_212| 1)))))) is different from false [2021-11-23 13:55:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15707 backedges. 506 proven. 6 refuted. 0 times theorem prover too weak. 15164 trivial. 31 not checked. [2021-11-23 13:55:15,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224453229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:55:15,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:55:15,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2021-11-23 13:55:15,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075571843] [2021-11-23 13:55:15,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:55:15,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 13:55:15,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:55:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 13:55:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1611, Unknown=25, NotChecked=534, Total=2450 [2021-11-23 13:55:15,455 INFO L87 Difference]: Start difference. First operand 386 states and 495 transitions. Second operand has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:55:49,114 WARN L227 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 135 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:56:27,460 WARN L227 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 136 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:56:39,769 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 113 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:56:42,463 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~#Weight~0#1.offset| 0) (<= (select .cse0 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= 20 |c_ULTIMATE.start_main_~edgecount~0#1|) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Source~0#1.base|)) (= |c_ULTIMATE.start_main_~#Dest~0#1.offset| 0) (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) (forall ((|ULTIMATE.start_main_~y~0#1| Int) (|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) |c_ULTIMATE.start_main_~#Dest~0#1.offset|) |v_ULTIMATE.start_main_~x~0#1_420|) (let ((.cse1 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) |c_ULTIMATE.start_main_~#Weight~0#1.offset|) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse1))) (<= (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse2 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4)) (select .cse1 (+ (* (select (select .cse2 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Weight~0#1.base|)) (= |c_ULTIMATE.start_main_~#Source~0#1.offset| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (exists ((|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_184| Int)) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|)) (.cse6 (* |v_ULTIMATE.start_main_~i~0#1_186| 4))) (let ((.cse4 (select .cse5 (+ .cse6 (- 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_186|) (= .cse4 (select .cse5 (+ (* |v_ULTIMATE.start_main_~i~0#1_184| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (= .cse4 (select .cse5 (+ 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_186| 5) (or (= (* 4 |v_ULTIMATE.start_main_~i~0#1_184|) 0) (= (select .cse5 |c_ULTIMATE.start_main_~#distance~0#1.offset|) 0)) (= .cse4 (select .cse5 (+ .cse6 |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Dest~0#1.base|)))) is different from false [2021-11-23 13:56:44,470 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|))) (and (= |c_ULTIMATE.start_main_~#Weight~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~x~0#1_420| Int)) (or (forall ((|ULTIMATE.start_main_~y~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~j~0#1| 4))) (let ((.cse0 (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~x~0#1_420| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| .cse2)) (select .cse3 (+ (* |ULTIMATE.start_main_~y~0#1| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base| .cse0))) (<= (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)) (+ (select (select .cse1 |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4 .cse2)) (select .cse0 (+ (* (select (select .cse1 |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4 .cse2)) 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))))))) (< (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Dest~0#1.base|) (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4))) |v_ULTIMATE.start_main_~x~0#1_420|))) (<= (select .cse4 |c_ULTIMATE.start_main_~#Dest~0#1.offset|) 1) (= 20 |c_ULTIMATE.start_main_~edgecount~0#1|) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Source~0#1.base|)) (= |c_ULTIMATE.start_main_~#Dest~0#1.offset| 0) (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Weight~0#1.base|) (+ |c_ULTIMATE.start_main_~#Weight~0#1.offset| 4))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#Source~0#1.base|) (+ |c_ULTIMATE.start_main_~#Source~0#1.offset| 4)) 4) (= |c_ULTIMATE.start_main_~#distance~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Weight~0#1.base|)) (= |c_ULTIMATE.start_main_~#Source~0#1.offset| 0) (= (select .cse4 (+ |c_ULTIMATE.start_main_~#Dest~0#1.offset| 4)) 3) (exists ((|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_184| Int)) (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#distance~0#1.base|)) (.cse7 (* |v_ULTIMATE.start_main_~i~0#1_186| 4))) (let ((.cse5 (select .cse6 (+ .cse7 (- 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|)))) (and (<= 4 |v_ULTIMATE.start_main_~i~0#1_186|) (= .cse5 (select .cse6 (+ (* |v_ULTIMATE.start_main_~i~0#1_184| 4) |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (= .cse5 (select .cse6 (+ 4 |c_ULTIMATE.start_main_~#distance~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_186| 5) (or (= (* 4 |v_ULTIMATE.start_main_~i~0#1_184|) 0) (= (select .cse6 |c_ULTIMATE.start_main_~#distance~0#1.offset|) 0)) (= .cse5 (select .cse6 (+ .cse7 |c_ULTIMATE.start_main_~#distance~0#1.offset|))))))) (= |c_ULTIMATE.start_main_~j~0#1| 0) (not (= |c_ULTIMATE.start_main_~#distance~0#1.base| |c_ULTIMATE.start_main_~#Dest~0#1.base|)))) is different from false [2021-11-23 13:56:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:45,529 INFO L93 Difference]: Finished difference Result 1114 states and 1415 transitions. [2021-11-23 13:56:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:56:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 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 383 [2021-11-23 13:56:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:45,536 INFO L225 Difference]: With dead ends: 1114 [2021-11-23 13:56:45,536 INFO L226 Difference]: Without dead ends: 753 [2021-11-23 13:56:45,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 738 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 149.3s TimeCoverageRelationStatistics Valid=586, Invalid=2942, Unknown=44, NotChecked=984, Total=4556 [2021-11-23 13:56:45,538 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:45,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 233 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 257 Invalid, 0 Unknown, 934 Unchecked, 0.4s Time] [2021-11-23 13:56:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-23 13:56:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 410. [2021-11-23 13:56:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.273838630806846) internal successors, (521), 409 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 521 transitions. [2021-11-23 13:56:45,581 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 521 transitions. Word has length 383 [2021-11-23 13:56:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:45,581 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 521 transitions. [2021-11-23 13:56:45,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.46) internal successors, (123), 50 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 521 transitions. [2021-11-23 13:56:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-23 13:56:45,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:45,585 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 99, 15, 15, 15, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:45,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:56:45,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -639451473, now seen corresponding path program 1 times [2021-11-23 13:56:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343013258] [2021-11-23 13:56:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:45,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:56:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-23 13:56:46,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:56:46,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343013258] [2021-11-23 13:56:46,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343013258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:56:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567739952] [2021-11-23 13:56:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:46,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:56:46,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:56:46,641 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:56:46,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:56:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:56:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 13:56:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:56:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-23 13:56:48,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:56:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2021-11-23 13:56:49,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567739952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:56:49,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:56:49,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2021-11-23 13:56:49,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283291228] [2021-11-23 13:56:49,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:56:49,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 13:56:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:56:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 13:56:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=1694, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 13:56:49,609 INFO L87 Difference]: Start difference. First operand 410 states and 521 transitions. Second operand has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:56:50,682 INFO L93 Difference]: Finished difference Result 1698 states and 2195 transitions. [2021-11-23 13:56:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 13:56:50,684 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-11-23 13:56:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:56:50,695 INFO L225 Difference]: With dead ends: 1698 [2021-11-23 13:56:50,695 INFO L226 Difference]: Without dead ends: 1691 [2021-11-23 13:56:50,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:56:50,697 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1354 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:56:50,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 283 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:56:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-23 13:56:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 425. [2021-11-23 13:56:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.2641509433962264) internal successors, (536), 424 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 536 transitions. [2021-11-23 13:56:50,747 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 536 transitions. Word has length 386 [2021-11-23 13:56:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:56:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 536 transitions. [2021-11-23 13:56:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6037735849056602) internal successors, (191), 53 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:56:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 536 transitions. [2021-11-23 13:56:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-23 13:56:50,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:56:50,751 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 99, 20, 20, 20, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:56:50,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:56:50,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14828145-8322-4266-a517-1e3955cc6f98/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:56:50,964 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:56:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:56:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1937318555, now seen corresponding path program 2 times [2021-11-23 13:56:50,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:56:50,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311138723] [2021-11-23 13:56:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:56:50,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms