./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL --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 a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:25:38,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:25:38,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:25:39,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:25:39,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:25:39,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:25:39,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:25:39,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:25:39,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:25:39,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:25:39,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:25:39,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:25:39,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:25:39,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:25:39,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:25:39,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:25:39,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:25:39,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:25:39,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:25:39,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:25:39,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:25:39,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:25:39,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:25:39,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:25:39,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:25:39,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:25:39,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:25:39,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:25:39,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:25:39,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:25:39,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:25:39,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:25:39,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:25:39,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:25:39,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:25:39,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:25:39,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:25:39,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:25:39,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:25:39,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:25:39,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:25:39,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:25:39,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:25:39,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:25:39,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:25:39,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:25:39,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:25:39,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:25:39,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:25:39,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:25:39,171 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:25:39,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:25:39,172 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:25:39,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:25:39,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:25:39,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:25:39,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:25:39,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:25:39,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:25:39,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:25:39,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:25:39,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:25:39,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:25:39,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:25:39,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:25:39,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:25:39,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:25:39,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:25:39,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:25:39,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:25:39,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:25:39,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:25:39,178 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:25:39,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:25:39,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:25:39,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:25:39,179 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_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a899e425fabfbfedb683b8dde873d61190b064645b1f5edf26c70c4b83dfe4a2 [2021-11-19 04:25:39,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:25:39,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:25:39,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:25:39,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:25:39,468 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:25:39,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-11-19 04:25:39,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/data/cba7d9526/d305efe0de0b4dcda051e5c611659d92/FLAG24e1d5a6c [2021-11-19 04:25:40,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:25:40,079 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-11-19 04:25:40,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/data/cba7d9526/d305efe0de0b4dcda051e5c611659d92/FLAG24e1d5a6c [2021-11-19 04:25:40,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/data/cba7d9526/d305efe0de0b4dcda051e5c611659d92 [2021-11-19 04:25:40,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:25:40,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:25:40,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:25:40,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:25:40,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:25:40,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48908ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40, skipping insertion in model container [2021-11-19 04:25:40,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:25:40,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:25:40,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2021-11-19 04:25:40,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:25:40,679 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:25:40,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2021-11-19 04:25:40,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:25:40,712 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:25:40,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40 WrapperNode [2021-11-19 04:25:40,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:25:40,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:25:40,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:25:40,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:25:40,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,751 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-19 04:25:40,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:25:40,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:25:40,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:25:40,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:25:40,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:25:40,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:25:40,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:25:40,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:25:40,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (1/1) ... [2021-11-19 04:25:40,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:25:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:40,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:25:40,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:25:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:25:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:25:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:25:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:25:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:25:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:25:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:25:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:25:40,951 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:25:40,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:25:41,088 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:25:41,095 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:25:41,095 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:25:41,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:25:41 BoogieIcfgContainer [2021-11-19 04:25:41,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:25:41,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:25:41,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:25:41,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:25:41,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:25:40" (1/3) ... [2021-11-19 04:25:41,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582130c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:25:41, skipping insertion in model container [2021-11-19 04:25:41,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:25:40" (2/3) ... [2021-11-19 04:25:41,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582130c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:25:41, skipping insertion in model container [2021-11-19 04:25:41,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:25:41" (3/3) ... [2021-11-19 04:25:41,108 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2021-11-19 04:25:41,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:25:41,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:25:41,165 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:25:41,174 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:25:41,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:25:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 04:25:41,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:41,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:41,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:41,206 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-11-19 04:25:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:41,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280252662] [2021-11-19 04:25:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:41,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:41,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:41,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280252662] [2021-11-19 04:25:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280252662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:41,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:41,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:25:41,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126221986] [2021-11-19 04:25:41,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:41,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:25:41,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:25:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:25:41,487 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:41,508 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-19 04:25:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:25:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-19 04:25:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:41,520 INFO L225 Difference]: With dead ends: 31 [2021-11-19 04:25:41,520 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 04:25:41,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:25:41,529 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:25:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 04:25:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 04:25:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-19 04:25:41,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-19 04:25:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-19 04:25:41,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-19 04:25:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 04:25:41,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:41,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:41,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:25:41,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-11-19 04:25:41,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:41,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572948789] [2021-11-19 04:25:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:41,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572948789] [2021-11-19 04:25:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572948789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:41,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:25:41,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533632602] [2021-11-19 04:25:41,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:41,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:25:41,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:25:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:41,718 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:41,793 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-19 04:25:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:25:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-19 04:25:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:41,795 INFO L225 Difference]: With dead ends: 37 [2021-11-19 04:25:41,795 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 04:25:41,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:25:41,802 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:41,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 04:25:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-19 04:25:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-19 04:25:41,818 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-19 04:25:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:41,820 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-19 04:25:41,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-19 04:25:41,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:25:41,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:41,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:41,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:25:41,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-11-19 04:25:41,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:41,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59267668] [2021-11-19 04:25:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:41,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:41,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:41,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59267668] [2021-11-19 04:25:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59267668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:41,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397458861] [2021-11-19 04:25:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:41,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:41,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:42,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:25:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:25:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:42,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397458861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:42,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:25:42,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-19 04:25:42,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450965851] [2021-11-19 04:25:42,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:42,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:25:42,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:25:42,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:25:42,223 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:42,334 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-19 04:25:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:25:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:25:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:42,336 INFO L225 Difference]: With dead ends: 61 [2021-11-19 04:25:42,336 INFO L226 Difference]: Without dead ends: 49 [2021-11-19 04:25:42,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:25:42,338 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 32 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-19 04:25:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 24. [2021-11-19 04:25:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-19 04:25:42,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2021-11-19 04:25:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:42,346 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-19 04:25:42,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-19 04:25:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:25:42,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:42,348 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:42,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:42,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:42,561 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1361285581, now seen corresponding path program 1 times [2021-11-19 04:25:42,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:42,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201233754] [2021-11-19 04:25:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:42,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:42,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:42,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827390089] [2021-11-19 04:25:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:42,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:42,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:25:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:25:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:42,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:43,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201233754] [2021-11-19 04:25:43,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827390089] [2021-11-19 04:25:43,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827390089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:43,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:43,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-19 04:25:43,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623373523] [2021-11-19 04:25:43,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:43,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:25:43,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:25:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:25:43,036 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:43,298 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-11-19 04:25:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:25:43,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 04:25:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:43,301 INFO L225 Difference]: With dead ends: 131 [2021-11-19 04:25:43,302 INFO L226 Difference]: Without dead ends: 117 [2021-11-19 04:25:43,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:25:43,303 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 324 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:43,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-19 04:25:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 42. [2021-11-19 04:25:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-11-19 04:25:43,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2021-11-19 04:25:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:43,313 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-11-19 04:25:43,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-11-19 04:25:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:25:43,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:43,315 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:43,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:43,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-19 04:25:43,542 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:43,543 INFO L85 PathProgramCache]: Analyzing trace with hash 194524081, now seen corresponding path program 2 times [2021-11-19 04:25:43,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:43,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413003625] [2021-11-19 04:25:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:43,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:43,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:43,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142565018] [2021-11-19 04:25:43,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:25:43,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:43,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:43,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:25:43,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 04:25:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:25:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:25:43,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-19 04:25:43,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:25:43,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:43,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413003625] [2021-11-19 04:25:43,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:43,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142565018] [2021-11-19 04:25:43,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142565018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:25:43,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:25:43,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:25:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588150837] [2021-11-19 04:25:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:25:43,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:25:43,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:25:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:25:43,932 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:44,018 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-19 04:25:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:25:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-19 04:25:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:44,023 INFO L225 Difference]: With dead ends: 61 [2021-11-19 04:25:44,024 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 04:25:44,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:25:44,026 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:44,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:25:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 04:25:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-11-19 04:25:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-19 04:25:44,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 39 [2021-11-19 04:25:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:44,053 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-19 04:25:44,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-19 04:25:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:25:44,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:44,058 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:44,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:44,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash -838184220, now seen corresponding path program 1 times [2021-11-19 04:25:44,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:44,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047392935] [2021-11-19 04:25:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:44,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:44,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:44,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563906568] [2021-11-19 04:25:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:44,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:44,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:44,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:25:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:25:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:44,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:45,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047392935] [2021-11-19 04:25:45,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563906568] [2021-11-19 04:25:45,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563906568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:45,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:45,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-19 04:25:45,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527792886] [2021-11-19 04:25:45,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:45,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:25:45,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:25:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:25:45,129 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:45,873 INFO L93 Difference]: Finished difference Result 547 states and 646 transitions. [2021-11-19 04:25:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:25:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-19 04:25:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:45,877 INFO L225 Difference]: With dead ends: 547 [2021-11-19 04:25:45,877 INFO L226 Difference]: Without dead ends: 512 [2021-11-19 04:25:45,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:25:45,880 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 983 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:45,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 134 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:25:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-19 04:25:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 90. [2021-11-19 04:25:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-11-19 04:25:45,896 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 45 [2021-11-19 04:25:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:45,896 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-11-19 04:25:45,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-11-19 04:25:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 04:25:45,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:45,899 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:45,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:46,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 04:25:46,119 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1895724964, now seen corresponding path program 2 times [2021-11-19 04:25:46,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:46,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843273006] [2021-11-19 04:25:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:46,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:46,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:46,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677747134] [2021-11-19 04:25:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:25:46,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:46,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:46,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:25:46,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:25:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:25:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:25:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:47,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:25:48,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:48,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843273006] [2021-11-19 04:25:48,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:48,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677747134] [2021-11-19 04:25:48,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677747134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:48,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-19 04:25:48,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999607336] [2021-11-19 04:25:48,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:48,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 04:25:48,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 04:25:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 04:25:48,013 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:50,372 INFO L93 Difference]: Finished difference Result 1135 states and 1342 transitions. [2021-11-19 04:25:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:25:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-19 04:25:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:50,380 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 04:25:50,381 INFO L226 Difference]: Without dead ends: 1082 [2021-11-19 04:25:50,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-11-19 04:25:50,386 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1681 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:50,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 278 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:25:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-19 04:25:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 162. [2021-11-19 04:25:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.173913043478261) internal successors, (189), 161 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 189 transitions. [2021-11-19 04:25:50,413 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 189 transitions. Word has length 81 [2021-11-19 04:25:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:50,413 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 189 transitions. [2021-11-19 04:25:50,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 189 transitions. [2021-11-19 04:25:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 04:25:50,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:50,417 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:50,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:50,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:50,634 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash 694735140, now seen corresponding path program 3 times [2021-11-19 04:25:50,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:50,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303466102] [2021-11-19 04:25:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:50,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:50,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:50,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452341831] [2021-11-19 04:25:50,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:25:50,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:50,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:50,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:50,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:25:50,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:25:50,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:25:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:25:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-19 04:25:51,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-11-19 04:25:54,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303466102] [2021-11-19 04:25:54,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:54,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452341831] [2021-11-19 04:25:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452341831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:54,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:54,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-19 04:25:54,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454868461] [2021-11-19 04:25:54,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:54,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:25:54,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:25:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:25:54,153 INFO L87 Difference]: Start difference. First operand 162 states and 189 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:54,323 INFO L93 Difference]: Finished difference Result 193 states and 228 transitions. [2021-11-19 04:25:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:25:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 04:25:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:54,327 INFO L225 Difference]: With dead ends: 193 [2021-11-19 04:25:54,328 INFO L226 Difference]: Without dead ends: 191 [2021-11-19 04:25:54,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:25:54,329 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:54,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 42 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:25:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-19 04:25:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2021-11-19 04:25:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.172972972972973) internal successors, (217), 185 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 217 transitions. [2021-11-19 04:25:54,350 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 217 transitions. Word has length 153 [2021-11-19 04:25:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:54,351 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 217 transitions. [2021-11-19 04:25:54,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 217 transitions. [2021-11-19 04:25:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 04:25:54,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:54,355 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:54,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:25:54,562 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -86837392, now seen corresponding path program 4 times [2021-11-19 04:25:54,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:54,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774824147] [2021-11-19 04:25:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:54,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:54,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:54,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056953545] [2021-11-19 04:25:54,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:25:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:54,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:54,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:25:54,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:25:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:25:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:25:54,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 737 proven. 1689 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-19 04:25:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 737 proven. 1689 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-19 04:25:59,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:59,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774824147] [2021-11-19 04:25:59,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:59,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056953545] [2021-11-19 04:25:59,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056953545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:59,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:25:59,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 63 [2021-11-19 04:25:59,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227496191] [2021-11-19 04:25:59,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:59,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-19 04:25:59,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-19 04:25:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=2685, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 04:25:59,677 INFO L87 Difference]: Start difference. First operand 186 states and 217 transitions. Second operand has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:08,568 INFO L93 Difference]: Finished difference Result 1036 states and 1266 transitions. [2021-11-19 04:26:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-19 04:26:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-19 04:26:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:08,575 INFO L225 Difference]: With dead ends: 1036 [2021-11-19 04:26:08,575 INFO L226 Difference]: Without dead ends: 1034 [2021-11-19 04:26:08,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22544 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=15355, Invalid=42967, Unknown=0, NotChecked=0, Total=58322 [2021-11-19 04:26:08,598 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 914 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:08,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 680 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:26:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-11-19 04:26:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 234. [2021-11-19 04:26:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1716738197424892) internal successors, (273), 233 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2021-11-19 04:26:08,634 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 177 [2021-11-19 04:26:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:08,635 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2021-11-19 04:26:08,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2021-11-19 04:26:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 04:26:08,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:08,639 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:08,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:08,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:08,873 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash -148776952, now seen corresponding path program 5 times [2021-11-19 04:26:08,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:08,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906961056] [2021-11-19 04:26:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:08,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:08,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:08,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483883148] [2021-11-19 04:26:08,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:26:08,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:08,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:08,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f7ce5d-4ffa-4b03-af7c-644ca69cf3f4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process