./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF --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 d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:26:54,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:26:54,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:26:54,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:26:54,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:26:54,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:26:54,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:26:54,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:26:54,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:26:54,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:26:54,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:26:54,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:26:54,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:26:54,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:26:54,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:26:54,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:26:54,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:26:54,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:26:54,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:26:54,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:26:54,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:26:54,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:26:54,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:26:54,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:26:54,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:26:54,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:26:54,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:26:54,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:26:54,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:26:54,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:26:54,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:26:54,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:26:54,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:26:54,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:26:54,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:26:54,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:26:54,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:26:54,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:26:54,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:26:54,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:26:54,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:26:54,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:26:54,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:26:54,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:26:54,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:26:54,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:26:54,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:26:54,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:26:54,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:26:54,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:26:54,706 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:26:54,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:26:54,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:26:54,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:26:54,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:26:54,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:26:54,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:26:54,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:26:54,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:26:54,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:26:54,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:26:54,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:26:54,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:26:54,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:26:54,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:26:54,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:26:54,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:54,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:26:54,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:26:54,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:26:54,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:26:54,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:26:54,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:26:54,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:26:54,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:26:54,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:26:54,714 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2021-11-20 06:26:54,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:26:54,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:26:54,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:26:54,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:26:54,997 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:26:54,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-crafted/zero_sum3.c [2021-11-20 06:26:55,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/e01b1170a/7d02527d0b0946d7be6bb737b963dea3/FLAGeb8e7830c [2021-11-20 06:26:55,540 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:26:55,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c [2021-11-20 06:26:55,546 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/e01b1170a/7d02527d0b0946d7be6bb737b963dea3/FLAGeb8e7830c [2021-11-20 06:26:55,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/e01b1170a/7d02527d0b0946d7be6bb737b963dea3 [2021-11-20 06:26:55,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:26:55,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:26:55,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:55,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:26:55,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:26:55,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:55" (1/1) ... [2021-11-20 06:26:55,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7881cd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:55, skipping insertion in model container [2021-11-20 06:26:55,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:55" (1/1) ... [2021-11-20 06:26:55,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:26:55,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:26:56,122 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2021-11-20 06:26:56,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:56,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:26:56,189 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2021-11-20 06:26:56,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:56,233 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:26:56,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56 WrapperNode [2021-11-20 06:26:56,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:56,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:56,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:26:56,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:26:56,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,269 INFO L137 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-11-20 06:26:56,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:56,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:26:56,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:26:56,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:26:56,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:26:56,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:26:56,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:26:56,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:26:56,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (1/1) ... [2021-11-20 06:26:56,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:56,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:26:56,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:26:56,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:26:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:26:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:26:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:26:56,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:26:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:26:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:26:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:26:56,487 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:26:56,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:26:56,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:26:56,636 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:26:56,636 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 06:26:56,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:56 BoogieIcfgContainer [2021-11-20 06:26:56,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:26:56,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:26:56,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:26:56,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:26:56,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:26:55" (1/3) ... [2021-11-20 06:26:56,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a776d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:56, skipping insertion in model container [2021-11-20 06:26:56,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:56" (2/3) ... [2021-11-20 06:26:56,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a776d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:56, skipping insertion in model container [2021-11-20 06:26:56,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:56" (3/3) ... [2021-11-20 06:26:56,648 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2021-11-20 06:26:56,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:26:56,654 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:26:56,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:26:56,708 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 [2021-11-20 06:26:56,708 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:26:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:26:56,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:56,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:56,754 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-11-20 06:26:56,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:56,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147793684] [2021-11-20 06:26:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:56,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:57,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:57,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147793684] [2021-11-20 06:26:57,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147793684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:57,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:57,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:26:57,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105823461] [2021-11-20 06:26:57,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:26:57,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:26:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:26:57,064 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 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 9.5) internal successors, (19), 2 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) [2021-11-20 06:26:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:57,080 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-11-20 06:26:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:26:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) Word has length 19 [2021-11-20 06:26:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:57,090 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:26:57,090 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:26:57,093 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 [2021-11-20 06:26:57,097 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-11-20 06:26:57,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:26:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 06:26:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-20 06:26:57,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-11-20 06:26:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:57,131 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-20 06:26:57,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-11-20 06:26:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-20 06:26:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:26:57,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:57,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:57,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:26:57,133 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-11-20 06:26:57,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:57,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316899215] [2021-11-20 06:26:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:57,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:57,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:57,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316899215] [2021-11-20 06:26:57,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316899215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:57,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:57,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:26:57,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149655591] [2021-11-20 06:26:57,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:57,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:26:57,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:26:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:26:57,200 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-11-20 06:26:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:57,251 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-20 06:26:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:26:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2021-11-20 06:26:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:57,253 INFO L225 Difference]: With dead ends: 51 [2021-11-20 06:26:57,256 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:26:57,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:26:57,259 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:57,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:26:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-20 06:26:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-20 06:26:57,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2021-11-20 06:26:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:57,274 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-20 06:26:57,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-11-20 06:26:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-20 06:26:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:26:57,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:57,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:57,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:26:57,281 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2021-11-20 06:26:57,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:57,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823031855] [2021-11-20 06:26:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:57,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:57,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823031855] [2021-11-20 06:26:57,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823031855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:57,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:57,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:26:57,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829450804] [2021-11-20 06:26:57,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:57,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:57,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:26:57,380 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:57,457 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-11-20 06:26:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-11-20 06:26:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:57,459 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:26:57,459 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:26:57,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:26:57,461 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:57,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:26:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-20 06:26:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-20 06:26:57,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-11-20 06:26:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-20 06:26:57,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-20 06:26:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:26:57,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:57,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:57,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:26:57,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:57,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2021-11-20 06:26:57,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:57,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715262003] [2021-11-20 06:26:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:57,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:57,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715262003] [2021-11-20 06:26:57,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715262003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041076917] [2021-11-20 06:26:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:57,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:57,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:57,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:26:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:26:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:57,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:57,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041076917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:57,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:57,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:26:57,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151616738] [2021-11-20 06:26:57,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:57,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:26:57,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:26:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:26:57,997 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:58,063 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-11-20 06:26:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 06:26:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:58,065 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:26:58,065 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:26:58,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:26:58,074 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:58,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:26:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-20 06:26:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-20 06:26:58,094 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2021-11-20 06:26:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:58,095 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-20 06:26:58,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-20 06:26:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:26:58,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:58,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:58,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:58,315 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2021-11-20 06:26:58,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:58,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409430703] [2021-11-20 06:26:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:26:58,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409430703] [2021-11-20 06:26:58,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409430703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055164357] [2021-11-20 06:26:58,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:26:58,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:58,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:58,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:26:58,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:26:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:26:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:26:58,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:26:58,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055164357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:58,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:58,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-20 06:26:58,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151133586] [2021-11-20 06:26:58,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:58,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:58,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:58,735 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:58,895 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-20 06:26:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:26:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 06:26:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:58,897 INFO L225 Difference]: With dead ends: 78 [2021-11-20 06:26:58,898 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 06:26:58,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:58,899 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:58,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 06:26:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-11-20 06:26:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-20 06:26:58,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2021-11-20 06:26:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-20 06:26:58,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-20 06:26:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:26:58,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:58,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:58,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:59,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:59,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2021-11-20 06:26:59,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:59,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907062609] [2021-11-20 06:26:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:59,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:00,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:00,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907062609] [2021-11-20 06:27:00,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907062609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:00,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55906671] [2021-11-20 06:27:00,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:27:00,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:00,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:00,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:27:00,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:27:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 06:27:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:02,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:27:02,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-20 06:27:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:03,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:30,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:27:30,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 121 [2021-11-20 06:27:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:31,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55906671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:31,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:31,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 32] total 63 [2021-11-20 06:27:31,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004512665] [2021-11-20 06:27:31,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:31,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 06:27:31,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 06:27:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3507, Unknown=8, NotChecked=0, Total=3906 [2021-11-20 06:27:31,814 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:50,361 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2021-11-20 06:27:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 06:27:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 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 47 [2021-11-20 06:27:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:50,366 INFO L225 Difference]: With dead ends: 162 [2021-11-20 06:27:50,366 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 06:27:50,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 46 SyntacticMatches, 36 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3599 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=1007, Invalid=8882, Unknown=11, NotChecked=0, Total=9900 [2021-11-20 06:27:50,372 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:50,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 124 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 333 Invalid, 0 Unknown, 606 Unchecked, 0.3s Time] [2021-11-20 06:27:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 06:27:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 77. [2021-11-20 06:27:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-11-20 06:27:50,386 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-11-20 06:27:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:50,386 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-11-20 06:27:50,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-11-20 06:27:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:27:50,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:50,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:50,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:50,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:50,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2021-11-20 06:27:50,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:50,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50004668] [2021-11-20 06:27:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:50,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:27:50,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:50,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50004668] [2021-11-20 06:27:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50004668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:50,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731218993] [2021-11-20 06:27:50,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:27:50,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:50,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:50,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:50,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:27:50,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:27:50,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:27:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:27:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:27:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731218993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:51,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 06:27:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924926277] [2021-11-20 06:27:51,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:51,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:27:51,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:27:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:51,099 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:51,309 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2021-11-20 06:27:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:27:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 06:27:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:51,312 INFO L225 Difference]: With dead ends: 152 [2021-11-20 06:27:51,312 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:27:51,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:51,313 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:51,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 89 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:27:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-20 06:27:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-11-20 06:27:51,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 49 [2021-11-20 06:27:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:51,325 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-11-20 06:27:51,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-11-20 06:27:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:27:51,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:51,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:51,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:51,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:51,549 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash -436136292, now seen corresponding path program 5 times [2021-11-20 06:27:51,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694148177] [2021-11-20 06:27:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:51,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:27:51,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:51,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694148177] [2021-11-20 06:27:51,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694148177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:51,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381833503] [2021-11-20 06:27:51,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:27:51,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:51,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:27:51,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:27:51,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:51,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:27:51,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:27:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:27:52,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381833503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:52,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:52,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 06:27:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856248743] [2021-11-20 06:27:52,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:27:52,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:27:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:52,058 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:52,240 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2021-11-20 06:27:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:27:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 06:27:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:52,241 INFO L225 Difference]: With dead ends: 125 [2021-11-20 06:27:52,242 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 06:27:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:27:52,243 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 33 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 06:27:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-11-20 06:27:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-20 06:27:52,250 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-11-20 06:27:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:52,251 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-20 06:27:52,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-20 06:27:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:27:52,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:52,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:52,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 06:27:52,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,457 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-11-20 06:27:52,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576508999] [2021-11-20 06:27:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:54,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576508999] [2021-11-20 06:27:54,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576508999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629537446] [2021-11-20 06:27:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:27:54,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:54,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:54,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:27:54,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:27:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 06:27:54,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:56,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:30,633 INFO L354 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2021-11-20 06:28:30,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 161 treesize of output 271 [2021-11-20 06:28:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:42,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629537446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:42,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:42,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 30, 34] total 94 [2021-11-20 06:28:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252128945] [2021-11-20 06:28:42,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-20 06:28:42,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-20 06:28:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=8074, Unknown=9, NotChecked=0, Total=8742 [2021-11-20 06:28:42,157 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:00,905 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2021-11-20 06:29:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-20 06:29:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 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 61 [2021-11-20 06:29:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:00,914 INFO L225 Difference]: With dead ends: 158 [2021-11-20 06:29:00,914 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 06:29:00,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=1443, Invalid=18288, Unknown=9, NotChecked=0, Total=19740 [2021-11-20 06:29:00,920 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:00,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 4166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2283 Invalid, 0 Unknown, 1533 Unchecked, 1.7s Time] [2021-11-20 06:29:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 06:29:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 109. [2021-11-20 06:29:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-11-20 06:29:00,934 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2021-11-20 06:29:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-11-20 06:29:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.7446808510638299) internal successors, (164), 94 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-11-20 06:29:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:29:00,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:00,937 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:00,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:01,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:01,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:01,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2021-11-20 06:29:01,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:01,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266098146] [2021-11-20 06:29:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:01,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:29:01,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:01,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266098146] [2021-11-20 06:29:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266098146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:01,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546409988] [2021-11-20 06:29:01,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:29:01,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:01,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:01,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:29:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:29:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:29:01,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:29:01,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546409988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:01,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:01,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 06:29:01,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053918559] [2021-11-20 06:29:01,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:01,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:29:01,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:29:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:29:01,689 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:01,933 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2021-11-20 06:29:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:29:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-20 06:29:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:01,934 INFO L225 Difference]: With dead ends: 225 [2021-11-20 06:29:01,934 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 06:29:01,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:29:01,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:01,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 76 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:29:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 06:29:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-20 06:29:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-11-20 06:29:01,948 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 63 [2021-11-20 06:29:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:01,948 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-11-20 06:29:01,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-11-20 06:29:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:29:01,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:01,950 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:01,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:02,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:29:02,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -784405174, now seen corresponding path program 8 times [2021-11-20 06:29:02,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:02,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768132460] [2021-11-20 06:29:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:02,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:29:02,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768132460] [2021-11-20 06:29:02,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768132460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212546758] [2021-11-20 06:29:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:29:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:02,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:02,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:29:02,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:29:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:29:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:29:02,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:29:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212546758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:02,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 06:29:02,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387663676] [2021-11-20 06:29:02,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:29:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:29:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:29:02,705 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:03,000 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-11-20 06:29:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:29:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 06:29:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:03,004 INFO L225 Difference]: With dead ends: 155 [2021-11-20 06:29:03,004 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 06:29:03,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:29:03,005 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:03,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 45 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:29:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 06:29:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-11-20 06:29:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-11-20 06:29:03,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2021-11-20 06:29:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:03,013 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-11-20 06:29:03,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-11-20 06:29:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 06:29:03,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:03,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:03,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 06:29:03,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:29:03,222 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2021-11-20 06:29:03,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:03,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432948997] [2021-11-20 06:29:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:03,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:07,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:07,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432948997] [2021-11-20 06:29:07,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432948997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:07,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536164169] [2021-11-20 06:29:07,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:29:07,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:07,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:07,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:07,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:29:07,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:29:07,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:07,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-20 06:29:07,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:29:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:29:11,328 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-20 06:29:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2021-11-20 06:29:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:29:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:29:20,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536164169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:20,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:20,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 26, 23] total 97 [2021-11-20 06:29:20,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811007903] [2021-11-20 06:29:20,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:20,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-20 06:29:20,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-20 06:29:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=8751, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 06:29:20,580 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:34,183 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-11-20 06:29:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-20 06:29:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 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 75 [2021-11-20 06:29:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:34,185 INFO L225 Difference]: With dead ends: 151 [2021-11-20 06:29:34,185 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 06:29:34,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 96 SyntacticMatches, 23 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8140 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=1766, Invalid=27646, Unknown=0, NotChecked=0, Total=29412 [2021-11-20 06:29:34,189 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:34,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 197 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1449 Invalid, 0 Unknown, 869 Unchecked, 1.1s Time] [2021-11-20 06:29:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 06:29:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-11-20 06:29:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-11-20 06:29:34,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 75 [2021-11-20 06:29:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:34,202 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-11-20 06:29:34,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.134020618556701) internal successors, (207), 97 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-11-20 06:29:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:29:34,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:34,204 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:34,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:34,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:29:34,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:34,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2021-11-20 06:29:34,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:34,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224525375] [2021-11-20 06:29:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:34,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:29:34,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224525375] [2021-11-20 06:29:34,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224525375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786991207] [2021-11-20 06:29:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:29:34,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:34,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:34,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:29:34,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:29:34,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:29:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:29:34,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 06:29:35,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786991207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:35,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:35,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-20 06:29:35,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527896243] [2021-11-20 06:29:35,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:35,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:29:35,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:29:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:29:35,002 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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) [2021-11-20 06:29:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:35,295 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2021-11-20 06:29:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:29:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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) Word has length 77 [2021-11-20 06:29:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:35,296 INFO L225 Difference]: With dead ends: 265 [2021-11-20 06:29:35,296 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:29:35,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:29:35,297 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:35,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 87 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:29:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:29:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-20 06:29:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-20 06:29:35,308 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 77 [2021-11-20 06:29:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:35,308 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-20 06:29:35,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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) [2021-11-20 06:29:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-20 06:29:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:29:35,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:35,309 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:35,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:35,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:29:35,510 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1014758264, now seen corresponding path program 11 times [2021-11-20 06:29:35,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356006002] [2021-11-20 06:29:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:35,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-20 06:29:35,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356006002] [2021-11-20 06:29:35,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356006002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462086168] [2021-11-20 06:29:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:29:35,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:35,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:35,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:29:35,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:29:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:29:35,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-20 06:29:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-20 06:29:36,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462086168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:36,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-20 06:29:36,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111704085] [2021-11-20 06:29:36,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:29:36,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:29:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:29:36,273 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:36,633 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2021-11-20 06:29:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:29:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 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 79 [2021-11-20 06:29:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:36,643 INFO L225 Difference]: With dead ends: 185 [2021-11-20 06:29:36,644 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 06:29:36,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:29:36,645 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:36,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 60 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:29:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 06:29:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-11-20 06:29:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-11-20 06:29:36,654 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2021-11-20 06:29:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:36,654 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-11-20 06:29:36,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3448275862068964) internal successors, (97), 29 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-11-20 06:29:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:29:36,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:36,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:36,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 06:29:36,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:36,856 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:36,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2021-11-20 06:29:36,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:36,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60762188] [2021-11-20 06:29:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:36,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:42,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60762188] [2021-11-20 06:29:42,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60762188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:42,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566508202] [2021-11-20 06:29:42,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:29:42,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:42,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:42,734 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:42,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:29:42,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 06:29:42,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:29:42,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-20 06:29:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:42,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:29:48,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:29:48,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 06:29:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:49,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:30:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566508202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:02,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:30:02,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 33, 27] total 113 [2021-11-20 06:30:02,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048369190] [2021-11-20 06:30:02,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:02,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-20 06:30:02,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-20 06:30:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=12076, Unknown=0, NotChecked=0, Total=12656 [2021-11-20 06:30:02,422 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:17,788 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2021-11-20 06:30:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-20 06:30:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 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 89 [2021-11-20 06:30:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:17,790 INFO L225 Difference]: With dead ends: 182 [2021-11-20 06:30:17,790 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 06:30:17,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 119 SyntacticMatches, 31 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9894 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1762, Invalid=32278, Unknown=0, NotChecked=0, Total=34040 [2021-11-20 06:30:17,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:17,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 200 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1908 Invalid, 0 Unknown, 1169 Unchecked, 1.6s Time] [2021-11-20 06:30:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 06:30:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2021-11-20 06:30:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 130 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2021-11-20 06:30:17,812 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2021-11-20 06:30:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2021-11-20 06:30:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2021-11-20 06:30:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 06:30:17,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:17,815 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:17,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:18,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:18,026 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:18,027 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2021-11-20 06:30:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:18,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502697673] [2021-11-20 06:30:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:18,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-20 06:30:18,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502697673] [2021-11-20 06:30:18,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502697673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:30:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789158730] [2021-11-20 06:30:18,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:30:18,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:30:18,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:30:18,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:30:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:30:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-20 06:30:18,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-20 06:30:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789158730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:18,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:30:18,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 06:30:18,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625937542] [2021-11-20 06:30:18,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:18,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:30:18,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:18,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:30:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:30:18,819 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:19,330 INFO L93 Difference]: Finished difference Result 313 states and 338 transitions. [2021-11-20 06:30:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:30:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 91 [2021-11-20 06:30:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:19,332 INFO L225 Difference]: With dead ends: 313 [2021-11-20 06:30:19,332 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 06:30:19,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:30:19,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:19,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 92 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:30:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 06:30:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-20 06:30:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-11-20 06:30:19,352 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 91 [2021-11-20 06:30:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:19,352 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-11-20 06:30:19,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-11-20 06:30:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:30:19,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:19,354 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:19,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:19,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:19,573 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 703668518, now seen corresponding path program 14 times [2021-11-20 06:30:19,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:19,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875601450] [2021-11-20 06:30:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:19,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:30:19,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875601450] [2021-11-20 06:30:19,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875601450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:30:19,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809606617] [2021-11-20 06:30:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:30:19,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:30:19,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:30:19,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:30:19,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:30:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:30:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:30:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:30:20,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:30:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809606617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:20,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:30:20,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-20 06:30:20,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894043687] [2021-11-20 06:30:20,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:20,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:30:20,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:30:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:30:20,349 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:20,734 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2021-11-20 06:30:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:30:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 93 [2021-11-20 06:30:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:20,735 INFO L225 Difference]: With dead ends: 215 [2021-11-20 06:30:20,735 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 06:30:20,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:30:20,736 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 245 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:20,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 33 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:30:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 06:30:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-11-20 06:30:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2021-11-20 06:30:20,749 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2021-11-20 06:30:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2021-11-20 06:30:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:30:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2021-11-20 06:30:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:30:20,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:20,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:20,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:20,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:30:20,974 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2021-11-20 06:30:20,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666998956] [2021-11-20 06:30:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:20,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 1 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666998956] [2021-11-20 06:30:29,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666998956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:30:29,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945655311] [2021-11-20 06:30:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:30:29,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:30:29,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:30:29,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:30:29,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 06:30:29,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:30:29,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 171 conjunts are in the unsatisfiable core [2021-11-20 06:30:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:30:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:42,617 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-20 06:30:42,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 107 [2021-11-20 06:30:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:30:43,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:31:02,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945655311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:02,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:31:02,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 36, 31] total 131 [2021-11-20 06:31:02,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442668262] [2021-11-20 06:31:02,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:02,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-20 06:31:02,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-20 06:31:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=16293, Unknown=1, NotChecked=0, Total=17030 [2021-11-20 06:31:02,382 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:23,954 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2021-11-20 06:31:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-20 06:31:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 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 103 [2021-11-20 06:31:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:23,956 INFO L225 Difference]: With dead ends: 181 [2021-11-20 06:31:23,957 INFO L226 Difference]: Without dead ends: 177 [2021-11-20 06:31:23,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 147 SyntacticMatches, 24 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10094 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=2039, Invalid=40602, Unknown=1, NotChecked=0, Total=42642 [2021-11-20 06:31:23,959 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1261 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:23,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 216 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 2524 Invalid, 0 Unknown, 1261 Unchecked, 2.2s Time] [2021-11-20 06:31:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-20 06:31:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2021-11-20 06:31:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0731707317073171) internal successors, (176), 164 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 176 transitions. [2021-11-20 06:31:23,983 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 176 transitions. Word has length 103 [2021-11-20 06:31:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:23,984 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 176 transitions. [2021-11-20 06:31:23,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 176 transitions. [2021-11-20 06:31:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:31:23,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:23,986 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:24,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:24,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:31:24,202 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:31:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599822, now seen corresponding path program 16 times [2021-11-20 06:31:24,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464953472] [2021-11-20 06:31:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:24,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 06:31:24,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464953472] [2021-11-20 06:31:24,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464953472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588063147] [2021-11-20 06:31:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:31:24,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:24,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:24,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:31:24,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:31:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:31:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 06:31:24,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-20 06:31:25,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588063147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:25,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:31:25,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-20 06:31:25,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485398586] [2021-11-20 06:31:25,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:25,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:31:25,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:31:25,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:31:25,094 INFO L87 Difference]: Start difference. First operand 165 states and 176 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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) [2021-11-20 06:31:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:25,622 INFO L93 Difference]: Finished difference Result 328 states and 350 transitions. [2021-11-20 06:31:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:31:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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 105 [2021-11-20 06:31:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:25,624 INFO L225 Difference]: With dead ends: 328 [2021-11-20 06:31:25,624 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 06:31:25,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:31:25,625 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:25,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 76 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:31:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 06:31:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-20 06:31:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.072289156626506) internal successors, (178), 166 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 178 transitions. [2021-11-20 06:31:25,648 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 178 transitions. Word has length 105 [2021-11-20 06:31:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:25,649 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 178 transitions. [2021-11-20 06:31:25,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 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) [2021-11-20 06:31:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 178 transitions. [2021-11-20 06:31:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 06:31:25,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:25,650 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:25,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:25,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:25,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:31:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1120878164, now seen corresponding path program 17 times [2021-11-20 06:31:25,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075664910] [2021-11-20 06:31:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:25,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-20 06:31:26,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075664910] [2021-11-20 06:31:26,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075664910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:26,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610866525] [2021-11-20 06:31:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:31:26,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:26,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:26,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:31:26,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:31:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:31:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-20 06:31:26,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-20 06:31:27,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610866525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:27,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:31:27,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-11-20 06:31:27,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081168146] [2021-11-20 06:31:27,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:27,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:31:27,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:31:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:31:27,129 INFO L87 Difference]: Start difference. First operand 167 states and 178 transitions. Second operand has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:27,720 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2021-11-20 06:31:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:31:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 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 107 [2021-11-20 06:31:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:27,726 INFO L225 Difference]: With dead ends: 245 [2021-11-20 06:31:27,726 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 06:31:27,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:31:27,727 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 402 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:27,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 58 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:31:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 06:31:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-11-20 06:31:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2021-11-20 06:31:27,745 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2021-11-20 06:31:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:27,745 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2021-11-20 06:31:27,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0) internal successors, (117), 39 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2021-11-20 06:31:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:31:27,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:27,746 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:27,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:27,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-20 06:31:27,958 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:31:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash 680376510, now seen corresponding path program 18 times [2021-11-20 06:31:27,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87975195] [2021-11-20 06:31:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:27,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 30 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:39,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:39,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87975195] [2021-11-20 06:31:39,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87975195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:31:39,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682911687] [2021-11-20 06:31:39,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:31:39,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:39,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:39,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:39,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:31:39,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 06:31:39,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:39,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-20 06:31:39,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:52,355 INFO L354 Elim1Store]: treesize reduction 332, result has 37.7 percent of original size [2021-11-20 06:31:52,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 189 treesize of output 237 [2021-11-20 06:31:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 13 proven. 294 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:31:53,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:19,038 INFO L354 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2021-11-20 06:32:19,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 289 treesize of output 371 [2021-11-20 06:32:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:32:43,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682911687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:43,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:32:43,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 38, 36] total 150 [2021-11-20 06:32:43,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081982167] [2021-11-20 06:32:43,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:43,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-11-20 06:32:43,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:32:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-11-20 06:32:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=21362, Unknown=0, NotChecked=0, Total=22350 [2021-11-20 06:32:43,171 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:24,317 INFO L93 Difference]: Finished difference Result 223 states and 236 transitions. [2021-11-20 06:33:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-20 06:33:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-20 06:33:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:24,320 INFO L225 Difference]: With dead ends: 223 [2021-11-20 06:33:24,320 INFO L226 Difference]: Without dead ends: 219 [2021-11-20 06:33:24,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 164 SyntacticMatches, 34 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16036 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=3276, Invalid=59976, Unknown=0, NotChecked=0, Total=63252 [2021-11-20 06:33:24,326 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 2968 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 5259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 2968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1798 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:24,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 232 Invalid, 5259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 2968 Invalid, 0 Unknown, 1798 Unchecked, 2.8s Time] [2021-11-20 06:33:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-20 06:33:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2021-11-20 06:33:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 170 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2021-11-20 06:33:24,373 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 117 [2021-11-20 06:33:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2021-11-20 06:33:24,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2021-11-20 06:33:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:33:24,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:24,376 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:24,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:24,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:24,591 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1060032224, now seen corresponding path program 19 times [2021-11-20 06:33:24,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:24,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885729749] [2021-11-20 06:33:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:24,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:33:24,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:24,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885729749] [2021-11-20 06:33:24,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885729749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:33:24,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199121779] [2021-11-20 06:33:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:33:24,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:24,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:24,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:24,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:33:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:33:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:33:25,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:33:25,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199121779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:25,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:33:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 06:33:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015988042] [2021-11-20 06:33:25,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:25,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:33:25,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:33:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:33:25,895 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:26,568 INFO L93 Difference]: Finished difference Result 409 states and 434 transitions. [2021-11-20 06:33:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:33:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 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 119 [2021-11-20 06:33:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:26,571 INFO L225 Difference]: With dead ends: 409 [2021-11-20 06:33:26,571 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 06:33:26,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:33:26,572 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:26,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 83 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:33:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 06:33:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-11-20 06:33:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.063953488372093) internal successors, (183), 172 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2021-11-20 06:33:26,597 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 119 [2021-11-20 06:33:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:26,597 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2021-11-20 06:33:26,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2021-11-20 06:33:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:33:26,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:26,599 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:26,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:26,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:33:26,819 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1161769730, now seen corresponding path program 20 times [2021-11-20 06:33:26,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:26,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400561412] [2021-11-20 06:33:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:26,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-20 06:33:27,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:27,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400561412] [2021-11-20 06:33:27,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400561412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:33:27,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853578191] [2021-11-20 06:33:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:33:27,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:27,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:27,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:27,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:33:27,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:33:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:33:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:33:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-20 06:33:27,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-20 06:33:27,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853578191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:27,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:33:27,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-20 06:33:27,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641274942] [2021-11-20 06:33:27,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:27,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:33:27,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:33:27,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:33:27,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:33:27,862 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:28,347 INFO L93 Difference]: Finished difference Result 275 states and 295 transitions. [2021-11-20 06:33:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:33:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 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 121 [2021-11-20 06:33:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:28,349 INFO L225 Difference]: With dead ends: 275 [2021-11-20 06:33:28,349 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 06:33:28,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:33:28,350 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 406 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:28,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 36 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:33:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 06:33:28,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-20 06:33:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0534351145038168) internal successors, (138), 131 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2021-11-20 06:33:28,372 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2021-11-20 06:33:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:28,372 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2021-11-20 06:33:28,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:33:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2021-11-20 06:33:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:33:28,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:28,374 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:28,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-20 06:33:28,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:28,590 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:33:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1125688340, now seen corresponding path program 21 times [2021-11-20 06:33:28,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:33:28,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195030344] [2021-11-20 06:33:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:28,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:33:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 12 proven. 436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:46,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:33:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195030344] [2021-11-20 06:33:46,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195030344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:33:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763542235] [2021-11-20 06:33:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:33:46,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:33:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:33:46,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:33:46,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:33:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 06:33:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:33:46,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 222 conjunts are in the unsatisfiable core [2021-11-20 06:33:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:08,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:08,770 INFO L354 Elim1Store]: treesize reduction 198, result has 40.2 percent of original size [2021-11-20 06:34:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 153 treesize of output 165 [2021-11-20 06:34:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 9 proven. 423 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:34:09,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:51,060 INFO L354 Elim1Store]: treesize reduction 1329, result has 30.3 percent of original size [2021-11-20 06:34:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 317 treesize of output 639 [2021-11-20 06:35:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 399 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:35:54,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763542235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:35:54,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:35:54,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 45, 40] total 167 [2021-11-20 06:35:54,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112610412] [2021-11-20 06:35:54,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:35:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-11-20 06:35:54,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:35:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-11-20 06:35:54,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1079, Invalid=26642, Unknown=1, NotChecked=0, Total=27722 [2021-11-20 06:35:54,963 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 167 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:17,302 INFO L93 Difference]: Finished difference Result 272 states and 288 transitions. [2021-11-20 06:37:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-20 06:37:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 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 131 [2021-11-20 06:37:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:17,305 INFO L225 Difference]: With dead ends: 272 [2021-11-20 06:37:17,306 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 06:37:17,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 186 SyntacticMatches, 28 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24598 ImplicationChecksByTransitivity, 138.9s TimeCoverageRelationStatistics Valid=4344, Invalid=86557, Unknown=1, NotChecked=0, Total=90902 [2021-11-20 06:37:17,312 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3901 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 7414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 3901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3094 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:17,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 275 Invalid, 7414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 3901 Invalid, 0 Unknown, 3094 Unchecked, 4.8s Time] [2021-11-20 06:37:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 06:37:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 191. [2021-11-20 06:37:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0578947368421052) internal successors, (201), 190 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2021-11-20 06:37:17,357 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 131 [2021-11-20 06:37:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:17,358 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2021-11-20 06:37:17,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2021-11-20 06:37:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:37:17,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:17,360 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:17,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:17,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:37:17,579 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash 598498958, now seen corresponding path program 22 times [2021-11-20 06:37:17,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:17,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537750796] [2021-11-20 06:37:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:17,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 06:37:17,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537750796] [2021-11-20 06:37:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537750796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:17,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261190337] [2021-11-20 06:37:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:37:17,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:17,888 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:17,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:37:18,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:37:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:37:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 06:37:18,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 06:37:19,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261190337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:19,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:19,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-20 06:37:19,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995686202] [2021-11-20 06:37:19,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:19,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:37:19,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:37:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:37:19,120 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:19,936 INFO L93 Difference]: Finished difference Result 457 states and 482 transitions. [2021-11-20 06:37:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:37:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:37:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:19,938 INFO L225 Difference]: With dead ends: 457 [2021-11-20 06:37:19,938 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 06:37:19,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:37:19,939 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:19,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 98 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:37:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 06:37:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-11-20 06:37:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0572916666666667) internal successors, (203), 192 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2021-11-20 06:37:19,980 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 133 [2021-11-20 06:37:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:19,981 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2021-11-20 06:37:19,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2021-11-20 06:37:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:37:19,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:19,983 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:20,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:20,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:20,206 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -228466896, now seen corresponding path program 23 times [2021-11-20 06:37:20,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:20,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876918129] [2021-11-20 06:37:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:20,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 06:37:20,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876918129] [2021-11-20 06:37:20,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876918129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575346918] [2021-11-20 06:37:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:37:20,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:20,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:20,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:37:21,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 06:37:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:37:21,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 06:37:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 06:37:22,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575346918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:22,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:37:22,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-20 06:37:22,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390377443] [2021-11-20 06:37:22,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:37:22,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:37:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:37:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:37:22,454 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:23,429 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2021-11-20 06:37:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:37:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-11-20 06:37:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:23,432 INFO L225 Difference]: With dead ends: 305 [2021-11-20 06:37:23,432 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 06:37:23,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:37:23,433 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 442 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:23,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 60 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:37:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 06:37:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-11-20 06:37:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 145 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2021-11-20 06:37:23,506 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 135 [2021-11-20 06:37:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:23,506 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2021-11-20 06:37:23,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:37:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2021-11-20 06:37:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 06:37:23,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:23,508 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:23,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:37:23,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:37:23,727 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:37:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1276094822, now seen corresponding path program 24 times [2021-11-20 06:37:23,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:37:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554608035] [2021-11-20 06:37:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:23,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:37:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 18 proven. 549 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:47,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:37:47,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554608035] [2021-11-20 06:37:47,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554608035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:37:47,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924640604] [2021-11-20 06:37:47,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:37:47,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:37:47,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:37:47,862 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:37:47,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:37:48,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 06:37:48,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:37:48,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 249 conjunts are in the unsatisfiable core [2021-11-20 06:37:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:48,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:38:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:20,675 INFO L354 Elim1Store]: treesize reduction 329, result has 36.9 percent of original size [2021-11-20 06:38:20,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 167 treesize of output 234 [2021-11-20 06:38:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 558 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:38:24,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:33,597 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 06:38:33,599 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-20 06:38:33,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:38:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2021-11-20 06:38:33,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404560498] [2021-11-20 06:38:33,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-20 06:38:33,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-20 06:38:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=23100, Unknown=0, NotChecked=0, Total=24180 [2021-11-20 06:38:33,602 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand has 111 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 111 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:38:33,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 41 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12462 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=1080, Invalid=23100, Unknown=0, NotChecked=0, Total=24180 [2021-11-20 06:38:33,604 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 [2021-11-20 06:38:33,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:33,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 06:38:33,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:33,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:38:33,806 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@10b34d10 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 06:38:33,810 INFO L158 Benchmark]: Toolchain (without parser) took 697898.70ms. Allocated memory was 83.9MB in the beginning and 553.6MB in the end (delta: 469.8MB). Free memory was 49.1MB in the beginning and 177.3MB in the end (delta: -128.3MB). Peak memory consumption was 341.0MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,810 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 84.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:38:33,810 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.19ms. Allocated memory was 83.9MB in the beginning and 104.9MB in the end (delta: 21.0MB). Free memory was 48.9MB in the beginning and 81.3MB in the end (delta: -32.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,811 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.48ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 79.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,811 INFO L158 Benchmark]: Boogie Preprocessor took 42.28ms. Allocated memory is still 104.9MB. Free memory was 79.4MB in the beginning and 78.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,811 INFO L158 Benchmark]: RCFGBuilder took 320.45ms. Allocated memory is still 104.9MB. Free memory was 78.2MB in the beginning and 67.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,812 INFO L158 Benchmark]: TraceAbstraction took 697168.66ms. Allocated memory was 104.9MB in the beginning and 553.6MB in the end (delta: 448.8MB). Free memory was 66.7MB in the beginning and 177.3MB in the end (delta: -110.7MB). Peak memory consumption was 341.4MB. Max. memory is 16.1GB. [2021-11-20 06:38:33,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 83.9MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 84.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.19ms. Allocated memory was 83.9MB in the beginning and 104.9MB in the end (delta: 21.0MB). Free memory was 48.9MB in the beginning and 81.3MB in the end (delta: -32.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.48ms. Allocated memory is still 104.9MB. Free memory was 81.3MB in the beginning and 79.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.28ms. Allocated memory is still 104.9MB. Free memory was 79.4MB in the beginning and 78.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 320.45ms. Allocated memory is still 104.9MB. Free memory was 78.2MB in the beginning and 67.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 697168.66ms. Allocated memory was 104.9MB in the beginning and 553.6MB in the end (delta: 448.8MB). Free memory was 66.7MB in the beginning and 177.3MB in the end (delta: -110.7MB). Peak memory consumption was 341.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@10b34d10 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@10b34d10: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF --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 d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:38:36,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:38:36,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:38:36,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:38:36,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:38:36,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:38:36,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:38:36,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:38:36,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:38:36,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:38:36,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:38:36,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:38:36,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:38:36,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:38:36,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:38:36,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:38:36,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:38:36,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:38:36,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:38:36,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:38:36,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:38:36,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:38:36,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:38:36,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:38:36,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:38:36,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:38:36,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:38:36,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:38:36,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:38:36,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:38:36,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:38:36,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:38:36,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:38:36,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:38:36,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:38:36,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:38:36,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:38:36,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:38:36,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:38:36,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:38:36,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:38:36,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:38:36,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:38:36,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:38:36,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:38:36,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:38:36,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:38:36,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:38:36,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:38:36,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:38:36,722 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:38:36,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:38:36,724 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:38:36,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:38:36,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:38:36,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:38:36,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:38:36,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:38:36,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:38:36,726 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:38:36,726 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:38:36,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:38:36,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:38:36,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:38:36,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:38:36,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:38:36,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:38:36,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:38:36,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:36,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:38:36,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:38:36,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:38:36,730 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:38:36,730 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:38:36,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:38:36,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:38:36,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:38:36,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:38:36,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:38:36,732 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2021-11-20 06:38:37,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:38:37,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:38:37,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:38:37,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:38:37,199 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:38:37,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-crafted/zero_sum3.c [2021-11-20 06:38:37,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/9fa693640/97d7eb95c7be40b89c5adc829ebcef02/FLAGc61264dd3 [2021-11-20 06:38:38,004 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:38:38,005 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c [2021-11-20 06:38:38,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/9fa693640/97d7eb95c7be40b89c5adc829ebcef02/FLAGc61264dd3 [2021-11-20 06:38:38,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/data/9fa693640/97d7eb95c7be40b89c5adc829ebcef02 [2021-11-20 06:38:38,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:38:38,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:38:38,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:38,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:38:38,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:38:38,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7ddefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38, skipping insertion in model container [2021-11-20 06:38:38,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:38:38,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:38:38,572 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2021-11-20 06:38:38,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:38,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:38:38,673 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_529a3c1b-14fc-4ccf-875d-d907b756e9dd/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2021-11-20 06:38:38,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:38,721 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:38:38,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38 WrapperNode [2021-11-20 06:38:38,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:38,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:38,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:38:38,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:38:38,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,769 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-11-20 06:38:38,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:38,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:38:38,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:38:38,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:38:38,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:38:38,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:38:38,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:38:38,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:38:38,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (1/1) ... [2021-11-20 06:38:38,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:38,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:38:38,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:38:38,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:38:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:38:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:38:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-20 06:38:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:38:38,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:38:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-20 06:38:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:38:39,006 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:38:39,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:38:39,391 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:38:39,399 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:38:39,414 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 06:38:39,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:39 BoogieIcfgContainer [2021-11-20 06:38:39,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:38:39,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:38:39,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:38:39,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:38:39,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:38:38" (1/3) ... [2021-11-20 06:38:39,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2e6199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:39, skipping insertion in model container [2021-11-20 06:38:39,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:38" (2/3) ... [2021-11-20 06:38:39,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2e6199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:39, skipping insertion in model container [2021-11-20 06:38:39,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:39" (3/3) ... [2021-11-20 06:38:39,426 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2021-11-20 06:38:39,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:38:39,432 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:38:39,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:38:39,499 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 [2021-11-20 06:38:39,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:38:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:38:39,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:39,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:39,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2021-11-20 06:38:39,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:39,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871587000] [2021-11-20 06:38:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:39,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:39,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:39,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:39,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:38:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:38:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:39,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:39,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871587000] [2021-11-20 06:38:39,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871587000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:39,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:39,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:38:39,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098735232] [2021-11-20 06:38:39,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:39,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:38:39,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:38:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:39,987 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 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 9.5) internal successors, (19), 2 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) [2021-11-20 06:38:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:40,015 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2021-11-20 06:38:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:38:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) Word has length 19 [2021-11-20 06:38:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:40,029 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:38:40,029 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:38:40,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:40,045 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-11-20 06:38:40,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:38:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 06:38:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-20 06:38:40,103 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2021-11-20 06:38:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:40,105 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-20 06:38:40,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2021-11-20 06:38:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-20 06:38:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:38:40,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:40,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:40,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:40,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:38:40,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2021-11-20 06:38:40,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534072346] [2021-11-20 06:38:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:40,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:40,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:38:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:38:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:40,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534072346] [2021-11-20 06:38:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534072346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:40,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:40,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:38:40,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013204489] [2021-11-20 06:38:40,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:40,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:38:40,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:38:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:38:40,699 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:40,783 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-11-20 06:38:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 19 [2021-11-20 06:38:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:40,787 INFO L225 Difference]: With dead ends: 42 [2021-11-20 06:38:40,787 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 06:38:40,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:38:40,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:40,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 06:38:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 06:38:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) [2021-11-20 06:38:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-20 06:38:40,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2021-11-20 06:38:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:40,809 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-20 06:38:40,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-20 06:38:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:38:40,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:40,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:40,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:41,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:38:41,026 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash -145263842, now seen corresponding path program 1 times [2021-11-20 06:38:41,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:41,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802721404] [2021-11-20 06:38:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:41,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:41,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:41,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:41,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:38:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:41,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:41,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802721404] [2021-11-20 06:38:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802721404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:41,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:41,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:38:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23853961] [2021-11-20 06:38:41,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:38:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:38:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:41,349 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-11-20 06:38:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:41,476 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2021-11-20 06:38:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 21 [2021-11-20 06:38:41,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:41,480 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:38:41,481 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:38:41,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:41,483 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:41,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:38:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-20 06:38:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-11-20 06:38:41,506 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2021-11-20 06:38:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:41,507 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-11-20 06:38:41,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-11-20 06:38:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-11-20 06:38:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:38:41,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:41,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:41,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:41,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:38:41,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1812138978, now seen corresponding path program 1 times [2021-11-20 06:38:41,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:41,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067707392] [2021-11-20 06:38:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:41,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:41,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:41,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:41,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:38:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:38:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:42,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:42,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067707392] [2021-11-20 06:38:42,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067707392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:42,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:42,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:38:42,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113286829] [2021-11-20 06:38:42,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:42,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:38:42,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:38:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:42,220 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:42,811 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2021-11-20 06:38:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:38:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:38:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:42,813 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:38:42,814 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 06:38:42,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:38:42,816 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:42,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 81 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:38:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 06:38:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-11-20 06:38:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-11-20 06:38:42,831 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 25 [2021-11-20 06:38:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:42,832 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-11-20 06:38:42,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-11-20 06:38:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:38:42,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:42,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:42,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:43,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:38:43,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1494066670, now seen corresponding path program 1 times [2021-11-20 06:38:43,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:43,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291976776] [2021-11-20 06:38:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:43,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:43,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:43,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:43,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:38:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:38:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:38:43,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:38:43,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291976776] [2021-11-20 06:38:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291976776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:43,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:43,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 06:38:43,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578863913] [2021-11-20 06:38:43,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:43,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:38:43,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:38:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:38:43,813 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-11-20 06:38:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:44,940 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2021-11-20 06:38:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:38:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 06:38:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:44,942 INFO L225 Difference]: With dead ends: 169 [2021-11-20 06:38:44,942 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 06:38:44,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:38:44,944 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 391 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:44,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 96 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:38:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 06:38:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 48. [2021-11-20 06:38:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-20 06:38:44,956 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2021-11-20 06:38:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:44,957 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-20 06:38:44,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-11-20 06:38:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-20 06:38:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:38:44,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:44,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:44,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:45,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:38:45,172 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 2 times [2021-11-20 06:38:45,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:38:45,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365810542] [2021-11-20 06:38:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:38:45,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:38:45,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:38:45,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:38:45,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:38:46,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:38:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:38:46,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:46,924 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:38:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-11-20 06:38:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:46,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:52,873 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-20 06:38:52,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-11-20 06:39:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:39:01,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365810542] [2021-11-20 06:39:01,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365810542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:01,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:01,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-20 06:39:01,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352850380] [2021-11-20 06:39:01,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:01,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:39:01,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:01,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:39:01,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=328, Unknown=3, NotChecked=0, Total=380 [2021-11-20 06:39:01,014 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:03,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:07,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:12,002 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:14,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:16,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:18,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:39:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:18,877 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-11-20 06:39:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:39:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 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 47 [2021-11-20 06:39:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:18,879 INFO L225 Difference]: With dead ends: 84 [2021-11-20 06:39:18,879 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:39:18,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=63, Invalid=440, Unknown=3, NotChecked=0, Total=506 [2021-11-20 06:39:18,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:18,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 113 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 429 Invalid, 6 Unknown, 15 Unchecked, 13.4s Time] [2021-11-20 06:39:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:39:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-20 06:39:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-11-20 06:39:18,895 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2021-11-20 06:39:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:18,896 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-11-20 06:39:18,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:18,896 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-11-20 06:39:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:39:18,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:18,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:18,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:19,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:19,107 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 3 times [2021-11-20 06:39:19,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:19,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041014122] [2021-11-20 06:39:19,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:39:19,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:19,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:19,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:19,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:39:19,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:39:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:19,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:39:19,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:39:19,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:19,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041014122] [2021-11-20 06:39:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041014122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:19,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:19,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-20 06:39:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139386907] [2021-11-20 06:39:19,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:19,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:39:19,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:39:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:39:19,945 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:20,830 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2021-11-20 06:39:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:39:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 06:39:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:20,832 INFO L225 Difference]: With dead ends: 154 [2021-11-20 06:39:20,832 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 06:39:20,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:39:20,833 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:20,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 67 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:39:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 06:39:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2021-11-20 06:39:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-11-20 06:39:20,850 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 49 [2021-11-20 06:39:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:20,850 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-11-20 06:39:20,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-11-20 06:39:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:39:20,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:20,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:20,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-20 06:39:21,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:21,067 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1725581382, now seen corresponding path program 4 times [2021-11-20 06:39:21,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:21,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740658147] [2021-11-20 06:39:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:39:21,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:21,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:21,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:39:21,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:39:21,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:39:21,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:39:21,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740658147] [2021-11-20 06:39:21,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740658147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:21,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:21,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 06:39:21,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586397819] [2021-11-20 06:39:21,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:21,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:39:21,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:21,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:39:21,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:39:21,851 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:22,342 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2021-11-20 06:39:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:39:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 06:39:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:22,344 INFO L225 Difference]: With dead ends: 159 [2021-11-20 06:39:22,345 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 06:39:22,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:39:22,347 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:22,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:39:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 06:39:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-20 06:39:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-20 06:39:22,362 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2021-11-20 06:39:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:22,363 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-20 06:39:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-20 06:39:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:39:22,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:22,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:22,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:22,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:22,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2021-11-20 06:39:22,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142205308] [2021-11-20 06:39:22,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:39:22,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:22,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:22,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:39:22,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:39:22,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:39:23,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:39:23,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:23,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142205308] [2021-11-20 06:39:23,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142205308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:23,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:23,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 06:39:23,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731051423] [2021-11-20 06:39:23,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:23,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:39:23,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:39:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:39:23,497 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:24,133 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-11-20 06:39:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:39:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 06:39:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:24,138 INFO L225 Difference]: With dead ends: 97 [2021-11-20 06:39:24,138 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 06:39:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:39:24,140 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:24,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 51 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:39:24,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 06:39:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-11-20 06:39:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-20 06:39:24,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2021-11-20 06:39:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-20 06:39:24,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-20 06:39:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:39:24,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:24,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:24,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 06:39:24,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:24,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2021-11-20 06:39:24,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:24,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067324477] [2021-11-20 06:39:24,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:39:24,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:24,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:24,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529a3c1b-14fc-4ccf-875d-d907b756e9dd/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:39:42,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 06:39:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 06:39:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:44,951 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 06:39:44,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 30 [2021-11-20 06:39:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:39:45,058 INFO L328 TraceCheckSpWp]: Computing backward predicates...