./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa --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 b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:26:59,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:26:59,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:26:59,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:26:59,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:26:59,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:26:59,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:26:59,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:26:59,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:26:59,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:26:59,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:26:59,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:26:59,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:26:59,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:26:59,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:26:59,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:26:59,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:26:59,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:26:59,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:26:59,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:26:59,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:26:59,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:26:59,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:26:59,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:26:59,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:26:59,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:26:59,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:26:59,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:26:59,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:26:59,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:26:59,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:26:59,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:26:59,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:26:59,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:26:59,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:26:59,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:26:59,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:26:59,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:26:59,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:26:59,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:26:59,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:26:59,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:26:59,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:26:59,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:26:59,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:26:59,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:26:59,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:26:59,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:26:59,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:26:59,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:26:59,196 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:26:59,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:26:59,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:26:59,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:26:59,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:26:59,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:26:59,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:26:59,199 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_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 [2021-12-06 20:26:59,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:26:59,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:26:59,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:26:59,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:26:59,395 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:26:59,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench/dijkstra-u.c [2021-12-06 20:26:59,445 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/data/e6c809d54/a1d523838fb8471ba9e28a50c550f545/FLAGd9ca786a2 [2021-12-06 20:26:59,819 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:26:59,819 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c [2021-12-06 20:26:59,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/data/e6c809d54/a1d523838fb8471ba9e28a50c550f545/FLAGd9ca786a2 [2021-12-06 20:26:59,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/data/e6c809d54/a1d523838fb8471ba9e28a50c550f545 [2021-12-06 20:26:59,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:26:59,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:26:59,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:26:59,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:26:59,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:26:59,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:26:59" (1/1) ... [2021-12-06 20:26:59,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b0919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:26:59, skipping insertion in model container [2021-12-06 20:26:59,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:26:59" (1/1) ... [2021-12-06 20:26:59,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:26:59,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:26:59,983 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_a8abc61f-3880-4035-b1e8-f5cc671201ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2021-12-06 20:27:00,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:27:00,008 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:27:00,017 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_a8abc61f-3880-4035-b1e8-f5cc671201ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2021-12-06 20:27:00,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:27:00,037 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:27:00,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00 WrapperNode [2021-12-06 20:27:00,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:27:00,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:27:00,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:27:00,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:27:00,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,064 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-06 20:27:00,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:27:00,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:27:00,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:27:00,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:27:00,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:27:00,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:27:00,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:27:00,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:27:00,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (1/1) ... [2021-12-06 20:27:00,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:27:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:00,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:27:00,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:27:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:27:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:27:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:27:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:27:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:27:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:27:00,199 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:27:00,200 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:27:00,295 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:27:00,300 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:27:00,300 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 20:27:00,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:27:00 BoogieIcfgContainer [2021-12-06 20:27:00,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:27:00,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:27:00,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:27:00,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:27:00,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:26:59" (1/3) ... [2021-12-06 20:27:00,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf4ecca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:27:00, skipping insertion in model container [2021-12-06 20:27:00,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:27:00" (2/3) ... [2021-12-06 20:27:00,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf4ecca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:27:00, skipping insertion in model container [2021-12-06 20:27:00,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:27:00" (3/3) ... [2021-12-06 20:27:00,309 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2021-12-06 20:27:00,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:27:00,314 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:27:00,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:27:00,357 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 [2021-12-06 20:27:00,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:27:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 20:27:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 20:27:00,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:00,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:00,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1104964382, now seen corresponding path program 1 times [2021-12-06 20:27:00,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:00,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384735793] [2021-12-06 20:27:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:00,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:00,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:00,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384735793] [2021-12-06 20:27:00,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384735793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:00,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:27:00,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:27:00,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853998835] [2021-12-06 20:27:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:00,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:27:00,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:27:00,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:27:00,523 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:00,546 INFO L93 Difference]: Finished difference Result 53 states and 93 transitions. [2021-12-06 20:27:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:27:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 20:27:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:00,554 INFO L225 Difference]: With dead ends: 53 [2021-12-06 20:27:00,554 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 20:27:00,556 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 [2021-12-06 20:27:00,559 INFO L933 BasicCegarLoop]: 38 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, 38 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 [2021-12-06 20:27:00,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:27:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 20:27:00,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 20:27:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 20:27:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2021-12-06 20:27:00,590 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2021-12-06 20:27:00,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:00,590 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2021-12-06 20:27:00,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2021-12-06 20:27:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:27:00,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:00,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:00,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:27:00,592 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2095754447, now seen corresponding path program 1 times [2021-12-06 20:27:00,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921978378] [2021-12-06 20:27:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:00,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:00,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921978378] [2021-12-06 20:27:00,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921978378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:00,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:27:00,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:27:00,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686369005] [2021-12-06 20:27:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:00,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:27:00,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:27:00,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:27:00,818 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:01,143 INFO L93 Difference]: Finished difference Result 59 states and 88 transitions. [2021-12-06 20:27:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:27:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:27:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:01,145 INFO L225 Difference]: With dead ends: 59 [2021-12-06 20:27:01,145 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 20:27:01,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:27:01,147 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:01,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:27:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 20:27:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-12-06 20:27:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 20:27:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2021-12-06 20:27:01,160 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 11 [2021-12-06 20:27:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:01,160 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2021-12-06 20:27:01,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2021-12-06 20:27:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:27:01,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:01,161 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:01,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:27:01,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 975763084, now seen corresponding path program 1 times [2021-12-06 20:27:01,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596745270] [2021-12-06 20:27:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:01,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:01,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596745270] [2021-12-06 20:27:01,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596745270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:27:01,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211621480] [2021-12-06 20:27:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:01,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:01,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:27:01,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:27:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:27:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:27:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:01,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:27:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211621480] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:27:01,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:27:01,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 20:27:01,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643614376] [2021-12-06 20:27:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:27:01,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:27:01,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:27:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:27:01,651 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:04,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:05,678 INFO L93 Difference]: Finished difference Result 75 states and 111 transitions. [2021-12-06 20:27:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:27:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:27:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:05,680 INFO L225 Difference]: With dead ends: 75 [2021-12-06 20:27:05,680 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 20:27:05,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:27:05,681 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 28 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:05,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 321 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 20:27:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 20:27:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-12-06 20:27:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:27:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2021-12-06 20:27:05,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 13 [2021-12-06 20:27:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:05,694 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2021-12-06 20:27:05,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2021-12-06 20:27:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:27:05,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:05,695 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:05,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:27:05,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:05,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1299424529, now seen corresponding path program 1 times [2021-12-06 20:27:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:05,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920638807] [2021-12-06 20:27:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:05,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:05,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:27:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499827568] [2021-12-06 20:27:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:05,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:05,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:05,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:27:05,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:27:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:27:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:27:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:27:06,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:27:06,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:06,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920638807] [2021-12-06 20:27:06,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:27:06,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499827568] [2021-12-06 20:27:06,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499827568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:06,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:27:06,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:27:06,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911208362] [2021-12-06 20:27:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:06,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:27:06,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:27:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:27:06,055 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:27:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:06,685 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2021-12-06 20:27:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:27:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-12-06 20:27:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:06,687 INFO L225 Difference]: With dead ends: 74 [2021-12-06 20:27:06,687 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 20:27:06,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:27:06,688 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:06,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:27:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 20:27:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 20:27:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 20:27:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2021-12-06 20:27:06,697 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 21 [2021-12-06 20:27:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:06,697 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2021-12-06 20:27:06,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:27:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2021-12-06 20:27:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 20:27:06,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:06,698 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:06,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:27:06,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:06,900 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1253152616, now seen corresponding path program 1 times [2021-12-06 20:27:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245931555] [2021-12-06 20:27:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:06,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:06,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:27:06,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413022032] [2021-12-06 20:27:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:06,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:06,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:27:06,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:27:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:06,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:27:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:27:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:27:07,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:27:07,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245931555] [2021-12-06 20:27:07,050 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:27:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413022032] [2021-12-06 20:27:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413022032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:07,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:27:07,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:27:07,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892634270] [2021-12-06 20:27:07,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:07,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:27:07,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:27:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:27:07,052 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:27:09,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 20:27:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:09,292 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2021-12-06 20:27:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:27:09,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 20:27:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:09,296 INFO L225 Difference]: With dead ends: 84 [2021-12-06 20:27:09,296 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:27:09,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:27:09,298 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:09,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:27:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:27:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-12-06 20:27:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 20:27:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2021-12-06 20:27:09,311 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 20 [2021-12-06 20:27:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:09,312 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2021-12-06 20:27:09,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:27:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2021-12-06 20:27:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 20:27:09,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:09,314 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:09,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:27:09,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:09,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1526553909, now seen corresponding path program 1 times [2021-12-06 20:27:09,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:09,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79820773] [2021-12-06 20:27:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:09,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:09,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:27:09,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767713521] [2021-12-06 20:27:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:09,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:09,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:09,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:27:09,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8abc61f-3880-4035-b1e8-f5cc671201ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process