./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg --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 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:53:11,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:53:11,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:53:12,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:53:12,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:53:12,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:53:12,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:53:12,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:53:12,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:53:12,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:53:12,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:53:12,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:53:12,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:53:12,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:53:12,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:53:12,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:53:12,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:53:12,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:53:12,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:53:12,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:53:12,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:53:12,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:53:12,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:53:12,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:53:12,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:53:12,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:53:12,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:53:12,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:53:12,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:53:12,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:53:12,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:53:12,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:53:12,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:53:12,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:53:12,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:53:12,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:53:12,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:53:12,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:53:12,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:53:12,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:53:12,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:53:12,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:53:12,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:53:12,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:53:12,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:53:12,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:53:12,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:53:12,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:53:12,153 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:53:12,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:53:12,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:53:12,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:53:12,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:53:12,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:53:12,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:53:12,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:53:12,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:53:12,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:53:12,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:53:12,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:53:12,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:53:12,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:53:12,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:53:12,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:53:12,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:53:12,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:53:12,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:53:12,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:53:12,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:53:12,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:53:12,161 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:53:12,162 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:53:12,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:53:12,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:53:12,163 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_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 [2021-10-28 09:53:12,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:53:12,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:53:12,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:53:12,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:53:12,534 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:53:12,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2021-10-28 09:53:12,633 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/data/a3ba137bb/6ff7066bcec745319f8b8f5e44dba5a7/FLAG5ae228619 [2021-10-28 09:53:13,317 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:53:13,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2021-10-28 09:53:13,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/data/a3ba137bb/6ff7066bcec745319f8b8f5e44dba5a7/FLAG5ae228619 [2021-10-28 09:53:13,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/data/a3ba137bb/6ff7066bcec745319f8b8f5e44dba5a7 [2021-10-28 09:53:13,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:53:13,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:53:13,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:53:13,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:53:13,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:53:13,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:53:13" (1/1) ... [2021-10-28 09:53:13,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373e6518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:13, skipping insertion in model container [2021-10-28 09:53:13,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:53:13" (1/1) ... [2021-10-28 09:53:13,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:53:13,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:53:13,914 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2021-10-28 09:53:13,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:53:13,959 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:53:13,980 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2021-10-28 09:53:13,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:53:14,000 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:53:14,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14 WrapperNode [2021-10-28 09:53:14,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:53:14,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:53:14,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:53:14,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:53:14,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:53:14,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:53:14,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:53:14,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:53:14,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:53:14,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:53:14,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:53:14,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:53:14,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (1/1) ... [2021-10-28 09:53:14,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:53:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:14,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:53:14,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:53:14,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:53:14,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:53:14,196 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-10-28 09:53:14,196 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-10-28 09:53:14,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:53:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:53:14,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:53:14,486 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:53:14,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:53:14 BoogieIcfgContainer [2021-10-28 09:53:14,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:53:14,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:53:14,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:53:14,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:53:14,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:53:13" (1/3) ... [2021-10-28 09:53:14,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be11084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:53:14, skipping insertion in model container [2021-10-28 09:53:14,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:53:14" (2/3) ... [2021-10-28 09:53:14,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be11084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:53:14, skipping insertion in model container [2021-10-28 09:53:14,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:53:14" (3/3) ... [2021-10-28 09:53:14,503 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2021-10-28 09:53:14,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:53:14,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:53:14,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:53:14,596 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 [2021-10-28 09:53:14,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:53:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:53:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:53:14,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:14,629 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:14,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-28 09:53:14,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:14,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316815759] [2021-10-28 09:53:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:14,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:14,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:53:15,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:15,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316815759] [2021-10-28 09:53:15,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316815759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:53:15,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:53:15,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:53:15,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490469772] [2021-10-28 09:53:15,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:53:15,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:53:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:53:15,044 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:15,113 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-28 09:53:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:53:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 09:53:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:15,126 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:53:15,126 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 09:53:15,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:53:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 09:53:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 09:53:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:53:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 09:53:15,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-28 09:53:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:15,188 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 09:53:15,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 09:53:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:53:15,190 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:15,190 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:53:15,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-28 09:53:15,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:15,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180841923] [2021-10-28 09:53:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:15,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:15,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:15,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:53:15,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:15,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180841923] [2021-10-28 09:53:15,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180841923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:15,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378151394] [2021-10-28 09:53:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:15,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:15,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:15,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:53:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:53:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:53:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378151394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:15,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:15,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:53:15,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577889768] [2021-10-28 09:53:15,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:53:15,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:53:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:53:15,662 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:53:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:15,765 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-28 09:53:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:53:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-28 09:53:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:15,767 INFO L225 Difference]: With dead ends: 22 [2021-10-28 09:53:15,767 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 09:53:15,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:53:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 09:53:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 09:53:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:53:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 09:53:15,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-28 09:53:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 09:53:15,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:53:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 09:53:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 09:53:15,777 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:15,777 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:15,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:15,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-28 09:53:15,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:15,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539695363] [2021-10-28 09:53:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:15,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:53:16,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:16,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539695363] [2021-10-28 09:53:16,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539695363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:16,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367285177] [2021-10-28 09:53:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:53:16,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:16,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:16,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:53:16,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:53:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:16,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 09:53:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:53:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367285177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:16,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:16,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 09:53:16,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986740019] [2021-10-28 09:53:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:53:16,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:53:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:53:16,488 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:53:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:16,610 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 09:53:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:53:16,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-28 09:53:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:16,613 INFO L225 Difference]: With dead ends: 25 [2021-10-28 09:53:16,613 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 09:53:16,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:53:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 09:53:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 09:53:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 09:53:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 09:53:16,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-28 09:53:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:16,622 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 09:53:16,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 09:53:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 09:53:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:53:16,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:16,624 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:16,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:16,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:16,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-28 09:53:16,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:16,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428715314] [2021-10-28 09:53:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:16,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:53:17,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:17,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428715314] [2021-10-28 09:53:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428715314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:17,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463458528] [2021-10-28 09:53:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:53:17,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:17,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:17,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:53:17,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:53:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:53:17,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:53:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463458528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:17,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 18 [2021-10-28 09:53:17,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689178004] [2021-10-28 09:53:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:53:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:53:17,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:53:17,411 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 09:53:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:17,660 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 09:53:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:53:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 28 [2021-10-28 09:53:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:17,663 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:53:17,663 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:53:17,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:53:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:53:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:53:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 09:53:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 09:53:17,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-28 09:53:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:17,673 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 09:53:17,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 09:53:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 09:53:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:53:17,675 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:17,676 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:17,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:17,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-28 09:53:17,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:17,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151019402] [2021-10-28 09:53:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:17,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:17,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:53:18,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:18,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151019402] [2021-10-28 09:53:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151019402] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:18,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285584965] [2021-10-28 09:53:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:53:18,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:18,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:18,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:53:18,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:53:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:53:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 09:53:18,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285584965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:18,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:18,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 09:53:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693118075] [2021-10-28 09:53:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:53:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:53:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:53:18,468 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:53:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:18,539 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 09:53:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:53:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-28 09:53:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:18,541 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:53:18,542 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 09:53:18,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:53:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 09:53:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 09:53:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 09:53:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 09:53:18,562 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-28 09:53:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:18,563 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 09:53:18,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 09:53:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 09:53:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:53:18,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:18,569 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:18,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:18,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:18,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-28 09:53:18,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:18,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705327158] [2021-10-28 09:53:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:18,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:53:18,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:18,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705327158] [2021-10-28 09:53:18,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705327158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:18,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023970255] [2021-10-28 09:53:18,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:53:18,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:18,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:18,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:18,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:53:19,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:53:19,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:53:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 09:53:19,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023970255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:19,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:19,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 09:53:19,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665567453] [2021-10-28 09:53:19,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:53:19,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:53:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:53:19,308 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:53:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:19,413 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 09:53:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:53:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-28 09:53:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:19,416 INFO L225 Difference]: With dead ends: 34 [2021-10-28 09:53:19,416 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:53:19,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:53:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:53:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:53:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-28 09:53:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 09:53:19,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-28 09:53:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:19,437 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 09:53:19,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 09:53:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 09:53:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:53:19,441 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:19,442 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:19,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:19,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:19,657 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-28 09:53:19,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:19,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748605112] [2021-10-28 09:53:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:19,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:53:19,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:19,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748605112] [2021-10-28 09:53:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748605112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:19,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051504494] [2021-10-28 09:53:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:53:19,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:19,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:19,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:53:20,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 09:53:20,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:53:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 09:53:20,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051504494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:20,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:20,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 27 [2021-10-28 09:53:20,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601323099] [2021-10-28 09:53:20,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:53:20,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:53:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:53:20,549 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 09:53:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:20,921 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 09:53:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:53:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) Word has length 46 [2021-10-28 09:53:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:20,923 INFO L225 Difference]: With dead ends: 37 [2021-10-28 09:53:20,923 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 09:53:20,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:53:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 09:53:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 09:53:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 09:53:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 09:53:20,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-28 09:53:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:20,931 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 09:53:20,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 09:53:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 09:53:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:53:20,934 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:20,935 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:20,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:21,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:21,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-28 09:53:21,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:21,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42102531] [2021-10-28 09:53:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:21,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:53:21,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:21,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42102531] [2021-10-28 09:53:21,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42102531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:21,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348804626] [2021-10-28 09:53:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:53:21,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:21,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:21,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:53:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:53:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 09:53:21,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348804626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:21,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:21,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-28 09:53:21,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925465955] [2021-10-28 09:53:21,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:53:21,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:53:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:53:21,804 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:53:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:21,940 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 09:53:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:53:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-28 09:53:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:21,943 INFO L225 Difference]: With dead ends: 40 [2021-10-28 09:53:21,944 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 09:53:21,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:53:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 09:53:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 09:53:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 09:53:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 09:53:21,969 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-28 09:53:21,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:21,972 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 09:53:21,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 09:53:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 09:53:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:53:21,976 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:21,976 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:22,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:53:22,177 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-28 09:53:22,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:22,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001544830] [2021-10-28 09:53:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:22,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:53:22,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001544830] [2021-10-28 09:53:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001544830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:22,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722501564] [2021-10-28 09:53:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:53:22,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:22,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:53:22,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:53:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:53:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 09:53:22,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722501564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:22,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:22,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-28 09:53:22,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622942392] [2021-10-28 09:53:22,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:53:22,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:53:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:53:22,878 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:53:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:23,007 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-28 09:53:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:53:23,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-28 09:53:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:23,012 INFO L225 Difference]: With dead ends: 43 [2021-10-28 09:53:23,012 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 09:53:23,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:53:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 09:53:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 09:53:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 09:53:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-28 09:53:23,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-28 09:53:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:23,029 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-28 09:53:23,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 09:53:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-28 09:53:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 09:53:23,035 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:23,036 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:23,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:23,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:23,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-28 09:53:23,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:23,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305820941] [2021-10-28 09:53:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:23,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:53:23,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:23,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305820941] [2021-10-28 09:53:23,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305820941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:23,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44498461] [2021-10-28 09:53:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:53:23,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:23,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:23,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:53:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:53:23,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:53:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 09:53:24,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44498461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:24,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:24,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 36 [2021-10-28 09:53:24,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446919406] [2021-10-28 09:53:24,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:53:24,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:24,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:53:24,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:53:24,620 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 09:53:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:25,167 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 09:53:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:53:25,167 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 64 [2021-10-28 09:53:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:25,169 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:53:25,169 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 09:53:25,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=2503, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:53:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 09:53:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 09:53:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 09:53:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 09:53:25,182 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-28 09:53:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:25,183 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 09:53:25,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 09:53:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 09:53:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:53:25,187 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:25,188 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:25,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:25,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:53:25,413 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-28 09:53:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:25,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3795641] [2021-10-28 09:53:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:25,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 09:53:25,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:25,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3795641] [2021-10-28 09:53:25,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3795641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:25,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482490115] [2021-10-28 09:53:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:53:25,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:25,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:25,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:53:26,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:53:26,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:26,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:53:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 09:53:26,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482490115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:26,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:26,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-28 09:53:26,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870595339] [2021-10-28 09:53:26,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:53:26,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:53:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:53:26,356 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 09:53:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:26,489 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-28 09:53:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:53:26,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-28 09:53:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:26,491 INFO L225 Difference]: With dead ends: 49 [2021-10-28 09:53:26,491 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 09:53:26,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:53:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 09:53:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 09:53:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-28 09:53:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-28 09:53:26,496 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-28 09:53:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:26,502 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-28 09:53:26,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 09:53:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-28 09:53:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 09:53:26,504 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:26,504 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:26,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:26,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:26,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:26,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-28 09:53:26,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:26,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476736733] [2021-10-28 09:53:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:26,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 09:53:27,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:27,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476736733] [2021-10-28 09:53:27,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476736733] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:27,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809070194] [2021-10-28 09:53:27,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:53:27,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:27,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:27,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:27,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:53:27,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 09:53:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:53:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 09:53:27,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809070194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:27,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-10-28 09:53:27,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878164934] [2021-10-28 09:53:27,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 09:53:27,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 09:53:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:53:27,702 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 09:53:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:27,852 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 09:53:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:53:27,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-28 09:53:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:27,854 INFO L225 Difference]: With dead ends: 52 [2021-10-28 09:53:27,855 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 09:53:27,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:53:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 09:53:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 09:53:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-28 09:53:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 09:53:27,861 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-28 09:53:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:27,862 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 09:53:27,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 09:53:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 09:53:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 09:53:27,863 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:27,864 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:27,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:28,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:28,077 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-28 09:53:28,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:28,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064386745] [2021-10-28 09:53:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:28,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 09:53:28,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:28,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064386745] [2021-10-28 09:53:28,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064386745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:28,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169374241] [2021-10-28 09:53:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:53:28,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:28,471 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:28,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:53:28,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 09:53:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:53:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 09:53:29,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169374241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:29,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-10-28 09:53:29,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406935926] [2021-10-28 09:53:29,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:53:29,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:53:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:53:29,081 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 09:53:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:29,229 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-28 09:53:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:53:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-28 09:53:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:29,235 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:53:29,235 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:53:29,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:53:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:53:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 09:53:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-28 09:53:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-28 09:53:29,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-28 09:53:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:29,253 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-28 09:53:29,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 09:53:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-28 09:53:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 09:53:29,257 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:29,257 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:29,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:29,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:53:29,481 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-28 09:53:29,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:29,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453308611] [2021-10-28 09:53:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:29,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 09:53:29,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:29,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453308611] [2021-10-28 09:53:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453308611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431675720] [2021-10-28 09:53:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:53:29,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:29,921 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:29,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:53:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:53:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 09:53:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431675720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:30,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:30,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-28 09:53:30,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871929549] [2021-10-28 09:53:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:53:30,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:53:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:53:30,611 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 09:53:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:30,800 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 09:53:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:53:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-28 09:53:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:30,802 INFO L225 Difference]: With dead ends: 58 [2021-10-28 09:53:30,802 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 09:53:30,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:53:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 09:53:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 09:53:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-28 09:53:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 09:53:30,811 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-28 09:53:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 09:53:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 09:53:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 09:53:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:53:30,815 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:30,816 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:31,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:53:31,025 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-28 09:53:31,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:31,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328147466] [2021-10-28 09:53:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:31,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 09:53:31,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:31,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328147466] [2021-10-28 09:53:31,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328147466] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:31,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694026861] [2021-10-28 09:53:31,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:53:31,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:31,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:31,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:53:31,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:53:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:31,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:53:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 09:53:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694026861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:32,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:32,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-10-28 09:53:32,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056424066] [2021-10-28 09:53:32,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:53:32,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:32,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:53:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:53:32,319 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 09:53:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:32,537 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-28 09:53:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:53:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-28 09:53:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:32,539 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:53:32,539 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:53:32,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:53:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:53:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 09:53:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-28 09:53:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-28 09:53:32,547 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-28 09:53:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:32,548 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-28 09:53:32,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 09:53:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-28 09:53:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 09:53:32,550 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:32,550 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:32,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:32,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:53:32,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:32,762 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-28 09:53:32,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:32,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572814836] [2021-10-28 09:53:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:32,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:32,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:32,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:32,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 09:53:33,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:33,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572814836] [2021-10-28 09:53:33,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572814836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:33,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673299644] [2021-10-28 09:53:33,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:53:33,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:33,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:33,310 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:33,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:53:33,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 09:53:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 09:53:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 09:53:34,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673299644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:34,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:34,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-28 09:53:34,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416536713] [2021-10-28 09:53:34,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:53:34,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:53:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:53:34,208 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 09:53:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:34,427 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-28 09:53:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:53:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-10-28 09:53:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:34,429 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:53:34,429 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:53:34,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:53:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:53:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:53:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-10-28 09:53:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 09:53:34,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-10-28 09:53:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:34,440 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 09:53:34,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 09:53:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 09:53:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:53:34,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:34,442 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:34,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:34,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:53:34,659 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-10-28 09:53:34,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:34,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20349729] [2021-10-28 09:53:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:34,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:34,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 09:53:35,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:35,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20349729] [2021-10-28 09:53:35,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20349729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:35,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888648199] [2021-10-28 09:53:35,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:53:35,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:35,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:35,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:53:35,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:53:35,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:53:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 09:53:36,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888648199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:36,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:36,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-10-28 09:53:36,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154802874] [2021-10-28 09:53:36,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:53:36,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:53:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:53:36,137 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 09:53:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:36,380 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-28 09:53:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:53:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-10-28 09:53:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:36,382 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:53:36,382 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 09:53:36,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:53:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 09:53:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 09:53:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-28 09:53:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-10-28 09:53:36,389 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-10-28 09:53:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:36,390 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-10-28 09:53:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 09:53:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-10-28 09:53:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 09:53:36,392 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:36,392 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:36,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:36,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:53:36,593 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-10-28 09:53:36,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:36,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655516218] [2021-10-28 09:53:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:36,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 09:53:37,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:37,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655516218] [2021-10-28 09:53:37,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655516218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813161363] [2021-10-28 09:53:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:53:37,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:37,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:37,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:53:37,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 09:53:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:37,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:53:37,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 09:53:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813161363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:38,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:38,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-10-28 09:53:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392268371] [2021-10-28 09:53:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:53:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:53:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:53:38,118 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 09:53:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:38,356 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 09:53:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:53:38,356 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-10-28 09:53:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:38,358 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:53:38,358 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 09:53:38,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:53:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 09:53:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 09:53:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-10-28 09:53:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-28 09:53:38,365 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-10-28 09:53:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-28 09:53:38,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 09:53:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-28 09:53:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:53:38,367 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:38,368 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:38,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:53:38,577 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-10-28 09:53:38,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:38,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351653512] [2021-10-28 09:53:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:38,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 09:53:39,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:39,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351653512] [2021-10-28 09:53:39,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351653512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:39,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530817190] [2021-10-28 09:53:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:53:39,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:39,409 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:53:39,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 09:53:39,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:53:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 09:53:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530817190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:40,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:40,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-28 09:53:40,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055022451] [2021-10-28 09:53:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:53:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:53:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:53:40,340 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-28 09:53:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:40,581 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-28 09:53:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:53:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) Word has length 118 [2021-10-28 09:53:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:40,583 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:53:40,583 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 09:53:40,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:53:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 09:53:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 09:53:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-28 09:53:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-10-28 09:53:40,590 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-10-28 09:53:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-10-28 09:53:40,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-10-28 09:53:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-10-28 09:53:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-28 09:53:40,596 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:40,597 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:40,825 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-10-28 09:53:40,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:40,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976925891] [2021-10-28 09:53:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:40,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:40,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:40,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 09:53:41,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:41,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976925891] [2021-10-28 09:53:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976925891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:41,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704350567] [2021-10-28 09:53:41,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:53:41,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:41,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:41,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:41,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:53:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:53:42,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 09:53:42,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704350567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:42,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:42,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-10-28 09:53:42,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438860339] [2021-10-28 09:53:42,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:53:42,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:42,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:53:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:53:42,801 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 09:53:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:43,077 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-28 09:53:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:53:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-10-28 09:53:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:43,079 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:53:43,079 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:53:43,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:53:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:53:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 09:53:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-10-28 09:53:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 09:53:43,086 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-10-28 09:53:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:43,087 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 09:53:43,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 09:53:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 09:53:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 09:53:43,089 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:43,089 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:43,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:43,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:43,305 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-10-28 09:53:43,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:43,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076080109] [2021-10-28 09:53:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:43,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 09:53:44,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:44,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076080109] [2021-10-28 09:53:44,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076080109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:44,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486356821] [2021-10-28 09:53:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:53:44,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:44,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:44,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:53:44,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:53:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:53:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-10-28 09:53:45,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486356821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:45,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:45,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-10-28 09:53:45,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094399388] [2021-10-28 09:53:45,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:53:45,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:53:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:53:45,200 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 09:53:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:45,483 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-28 09:53:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:53:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) Word has length 130 [2021-10-28 09:53:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:45,485 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:53:45,485 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:53:45,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:53:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:53:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:53:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-10-28 09:53:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-10-28 09:53:45,492 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-10-28 09:53:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:45,493 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-10-28 09:53:45,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (41), 21 states have call predecessors, (41), 3 states have call successors, (41) [2021-10-28 09:53:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-10-28 09:53:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 09:53:45,496 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:45,496 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:45,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:45,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:45,709 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-10-28 09:53:45,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:45,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431916188] [2021-10-28 09:53:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:45,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 09:53:46,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431916188] [2021-10-28 09:53:46,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431916188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:46,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999789530] [2021-10-28 09:53:46,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:53:46,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:46,694 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:46,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:53:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-28 09:53:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:53:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-10-28 09:53:47,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999789530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:47,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:47,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-10-28 09:53:47,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82682456] [2021-10-28 09:53:47,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:53:47,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:53:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:53:47,768 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 09:53:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:48,044 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-10-28 09:53:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:53:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) Word has length 136 [2021-10-28 09:53:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:48,045 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:53:48,045 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 09:53:48,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:53:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 09:53:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 09:53:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2021-10-28 09:53:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-10-28 09:53:48,051 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-10-28 09:53:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:48,052 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-10-28 09:53:48,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 22 states have return successors, (43), 22 states have call predecessors, (43), 3 states have call successors, (43) [2021-10-28 09:53:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-10-28 09:53:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-28 09:53:48,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:48,054 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:48,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-28 09:53:48,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:53:48,257 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-10-28 09:53:48,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:48,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933444731] [2021-10-28 09:53:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:48,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 09:53:49,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:49,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933444731] [2021-10-28 09:53:49,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933444731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:49,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078646841] [2021-10-28 09:53:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:53:49,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:49,545 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:49,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:53:50,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:53:50,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:53:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-10-28 09:53:50,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078646841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:50,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:50,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-10-28 09:53:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478515591] [2021-10-28 09:53:50,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:53:50,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:53:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:53:50,788 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 09:53:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:51,111 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-10-28 09:53:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 09:53:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) Word has length 142 [2021-10-28 09:53:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:51,113 INFO L225 Difference]: With dead ends: 85 [2021-10-28 09:53:51,113 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:53:51,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:53:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:53:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 09:53:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-10-28 09:53:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-10-28 09:53:51,123 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-10-28 09:53:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:51,128 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-10-28 09:53:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 23 states have return successors, (45), 23 states have call predecessors, (45), 3 states have call successors, (45) [2021-10-28 09:53:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-10-28 09:53:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-10-28 09:53:51,131 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:51,132 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:51,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 09:53:51,347 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-10-28 09:53:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:51,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873723792] [2021-10-28 09:53:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:51,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:51,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 09:53:52,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:52,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873723792] [2021-10-28 09:53:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873723792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:52,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474060505] [2021-10-28 09:53:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:53:52,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:52,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:52,573 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:52,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:53:53,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-10-28 09:53:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:53,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:53:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-28 09:53:53,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474060505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:53,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:53,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-10-28 09:53:53,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489654927] [2021-10-28 09:53:53,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:53:53,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:53:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:53:53,887 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-28 09:53:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:54,276 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-28 09:53:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:53:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) Word has length 148 [2021-10-28 09:53:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:54,281 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:53:54,282 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:53:54,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:53:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:53:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-28 09:53:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-10-28 09:53:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-28 09:53:54,299 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-10-28 09:53:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:54,299 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-28 09:53:54,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 24 states have return successors, (47), 24 states have call predecessors, (47), 3 states have call successors, (47) [2021-10-28 09:53:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-28 09:53:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-28 09:53:54,323 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:54,324 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:54,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:54,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:54,537 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-10-28 09:53:54,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:54,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374250084] [2021-10-28 09:53:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:54,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:54,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 09:53:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 09:53:55,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:55,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374250084] [2021-10-28 09:53:55,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374250084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:55,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117105263] [2021-10-28 09:53:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:53:55,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:55,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:55,873 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:55,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:53:56,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-28 09:53:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 09:53:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-10-28 09:53:57,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117105263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:57,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:57,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-10-28 09:53:57,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401127395] [2021-10-28 09:53:57,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:53:57,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:53:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:53:57,266 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 09:53:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:57,605 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-10-28 09:53:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:53:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) Word has length 154 [2021-10-28 09:53:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:57,607 INFO L225 Difference]: With dead ends: 91 [2021-10-28 09:53:57,607 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 09:53:57,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:53:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 09:53:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-28 09:53:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2021-10-28 09:53:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-10-28 09:53:57,615 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-10-28 09:53:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:57,616 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-10-28 09:53:57,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 25 states have return successors, (49), 25 states have call predecessors, (49), 3 states have call successors, (49) [2021-10-28 09:53:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-10-28 09:53:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-28 09:53:57,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:57,618 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:57,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:53:57,825 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:53:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-10-28 09:53:57,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:57,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540983225] [2021-10-28 09:53:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:57,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:53:57,874 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:53:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:53:58,020 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:53:58,020 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:53:58,021 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:53:58,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 09:53:58,028 INFO L731 BasicCegarLoop]: Path program histogram: [25, 1] [2021-10-28 09:53:58,032 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:53:58,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:53:58 BoogieIcfgContainer [2021-10-28 09:53:58,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:53:58,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:53:58,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:53:58,152 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:53:58,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:53:14" (3/4) ... [2021-10-28 09:53:58,155 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:53:58,263 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:53:58,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:53:58,266 INFO L168 Benchmark]: Toolchain (without parser) took 44596.29 ms. Allocated memory was 94.4 MB in the beginning and 362.8 MB in the end (delta: 268.4 MB). Free memory was 58.8 MB in the beginning and 111.9 MB in the end (delta: -53.1 MB). Peak memory consumption was 215.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,266 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 94.4 MB. Free memory is still 74.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:53:58,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.66 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 72.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,267 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.35 ms. Allocated memory is still 94.4 MB. Free memory was 71.7 MB in the beginning and 70.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,268 INFO L168 Benchmark]: Boogie Preprocessor took 33.22 ms. Allocated memory is still 94.4 MB. Free memory was 70.3 MB in the beginning and 69.6 MB in the end (delta: 758.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:53:58,268 INFO L168 Benchmark]: RCFGBuilder took 407.74 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 60.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,269 INFO L168 Benchmark]: TraceAbstraction took 43658.62 ms. Allocated memory was 94.4 MB in the beginning and 362.8 MB in the end (delta: 268.4 MB). Free memory was 60.2 MB in the beginning and 120.3 MB in the end (delta: -60.1 MB). Peak memory consumption was 211.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,270 INFO L168 Benchmark]: Witness Printer took 112.65 ms. Allocated memory is still 362.8 MB. Free memory was 120.3 MB in the beginning and 111.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:58,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 94.4 MB. Free memory is still 74.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.66 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 72.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.35 ms. Allocated memory is still 94.4 MB. Free memory was 71.7 MB in the beginning and 70.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.22 ms. Allocated memory is still 94.4 MB. Free memory was 70.3 MB in the beginning and 69.6 MB in the end (delta: 758.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 407.74 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 60.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 43658.62 ms. Allocated memory was 94.4 MB in the beginning and 362.8 MB in the end (delta: 268.4 MB). Free memory was 60.2 MB in the beginning and 120.3 MB in the end (delta: -60.1 MB). Peak memory consumption was 211.5 MB. Max. memory is 16.1 GB. * Witness Printer took 112.65 ms. Allocated memory is still 362.8 MB. Free memory was 120.3 MB in the beginning and 111.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 25; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 43.4s, OverallIterations: 26, TraceHistogramMax: 26, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 224 SDtfs, 1147 SDslu, 1362 SDs, 0 SdLazy, 1442 SolverSat, 332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3412 GetRequests, 2622 SyntacticMatches, 0 SemanticMatches, 790 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6034 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, InterpolantAutomatonStates: 443, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4041 ConstructedInterpolants, 0 QuantifiedInterpolants, 10589 SizeOfPredicates, 336 NumberOfNonLiveVariables, 6792 ConjunctsInSsa, 744 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:53:58,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16beff89-c0d5-4282-a4a7-334f1912dea8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...