./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49a20f83cf329df91226e628147ac8e7ab93deb8d5efcb58cae512b640c9b509 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:29:16,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:29:16,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:29:17,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:29:17,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:29:17,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:29:17,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:29:17,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:29:17,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:29:17,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:29:17,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:29:17,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:29:17,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:29:17,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:29:17,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:29:17,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:29:17,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:29:17,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:29:17,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:29:17,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:29:17,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:29:17,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:29:17,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:29:17,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:29:17,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:29:17,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:29:17,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:29:17,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:29:17,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:29:17,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:29:17,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:29:17,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:29:17,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:29:17,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:29:17,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:29:17,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:29:17,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:29:17,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:29:17,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:29:17,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:29:17,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:29:17,151 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:29:17,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:29:17,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:29:17,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:29:17,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:29:17,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:29:17,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:29:17,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:29:17,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:29:17,214 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:29:17,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:29:17,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:29:17,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:29:17,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:29:17,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:29:17,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:29:17,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:29:17,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:29:17,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:29:17,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:29:17,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:29:17,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:29:17,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:29:17,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:29:17,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:29:17,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:29:17,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:29:17,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:29:17,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:29:17,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:29:17,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:29:17,224 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:29:17,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:29:17,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:29:17,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:29:17,226 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_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49a20f83cf329df91226e628147ac8e7ab93deb8d5efcb58cae512b640c9b509 [2021-11-19 04:29:17,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:29:17,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:29:17,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:29:17,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:29:17,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:29:17,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2021-11-19 04:29:17,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/data/c942932a7/e02927bcdeca47c4b7435840c80f450a/FLAGfd03d5352 [2021-11-19 04:29:18,370 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:29:18,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c [2021-11-19 04:29:18,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/data/c942932a7/e02927bcdeca47c4b7435840c80f450a/FLAGfd03d5352 [2021-11-19 04:29:18,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/data/c942932a7/e02927bcdeca47c4b7435840c80f450a [2021-11-19 04:29:18,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:29:18,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:29:18,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:29:18,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:29:18,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:29:18,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:18" (1/1) ... [2021-11-19 04:29:18,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c762a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:18, skipping insertion in model container [2021-11-19 04:29:18,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:18" (1/1) ... [2021-11-19 04:29:18,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:29:18,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:29:18,967 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_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c[525,538] [2021-11-19 04:29:19,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:19,015 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:29:19,031 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_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound20.c[525,538] [2021-11-19 04:29:19,052 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:19,069 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:29:19,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19 WrapperNode [2021-11-19 04:29:19,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:29:19,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:19,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:29:19,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:29:19,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,125 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-19 04:29:19,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:19,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:29:19,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:29:19,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:29:19,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:29:19,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:29:19,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:29:19,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:29:19,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (1/1) ... [2021-11-19 04:29:19,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:29:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:19,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:29:19,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:29:19,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:29:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:29:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:29:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:29:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:29:19,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:29:19,388 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:29:19,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:29:19,631 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:29:19,640 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:29:19,640 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:29:19,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:19 BoogieIcfgContainer [2021-11-19 04:29:19,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:29:19,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:29:19,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:29:19,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:29:19,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:29:18" (1/3) ... [2021-11-19 04:29:19,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aad7dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:19, skipping insertion in model container [2021-11-19 04:29:19,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:19" (2/3) ... [2021-11-19 04:29:19,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aad7dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:19, skipping insertion in model container [2021-11-19 04:29:19,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:19" (3/3) ... [2021-11-19 04:29:19,654 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound20.c [2021-11-19 04:29:19,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:29:19,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:29:19,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:29:19,801 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:29:19,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:29:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-11-19 04:29:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:29:19,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:19,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:19,863 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2021-11-19 04:29:19,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:19,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215104001] [2021-11-19 04:29:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:19,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:20,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:20,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215104001] [2021-11-19 04:29:20,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215104001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:20,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:20,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:29:20,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017590903] [2021-11-19 04:29:20,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:20,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:29:20,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:29:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:29:20,190 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-11-19 04:29:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:20,244 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-11-19 04:29:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:29:20,251 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 [2021-11-19 04:29:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:20,265 INFO L225 Difference]: With dead ends: 57 [2021-11-19 04:29:20,265 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 04:29:20,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:29:20,288 INFO L933 BasicCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:20,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 04:29:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 04:29:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-19 04:29:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2021-11-19 04:29:20,390 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2021-11-19 04:29:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:20,391 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2021-11-19 04:29:20,392 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) [2021-11-19 04:29:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2021-11-19 04:29:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:29:20,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:20,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:20,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:29:20,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2021-11-19 04:29:20,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:20,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555874169] [2021-11-19 04:29:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:20,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:20,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555874169] [2021-11-19 04:29:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555874169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:20,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:20,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:20,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986107102] [2021-11-19 04:29:20,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:29:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:29:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:29:20,534 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-19 04:29:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:20,602 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-11-19 04:29:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:29:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2021-11-19 04:29:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:20,605 INFO L225 Difference]: With dead ends: 47 [2021-11-19 04:29:20,606 INFO L226 Difference]: Without dead ends: 28 [2021-11-19 04:29:20,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:29:20,616 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:20,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-19 04:29:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-19 04:29:20,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2021-11-19 04:29:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2021-11-19 04:29:20,660 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2021-11-19 04:29:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:20,660 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2021-11-19 04:29:20,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-19 04:29:20,661 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2021-11-19 04:29:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:29:20,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:20,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:20,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:29:20,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2021-11-19 04:29:20,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:20,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538852284] [2021-11-19 04:29:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:20,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:20,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:20,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089681506] [2021-11-19 04:29:20,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:20,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:20,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:20,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:29:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:29:20,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:20,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:29:20,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:20,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538852284] [2021-11-19 04:29:20,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:20,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089681506] [2021-11-19 04:29:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089681506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:21,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:21,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:29:21,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90956785] [2021-11-19 04:29:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:21,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:21,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:21,012 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-19 04:29:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:21,073 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-11-19 04:29:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:21,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2021-11-19 04:29:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:21,079 INFO L225 Difference]: With dead ends: 41 [2021-11-19 04:29:21,079 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 04:29:21,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:21,086 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:21,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 04:29:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-19 04:29:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2021-11-19 04:29:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2021-11-19 04:29:21,109 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2021-11-19 04:29:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:21,110 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2021-11-19 04:29:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-19 04:29:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2021-11-19 04:29:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:29:21,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:21,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:21,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 04:29:21,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:21,344 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2021-11-19 04:29:21,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:21,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827771452] [2021-11-19 04:29:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:21,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:21,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:21,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827771452] [2021-11-19 04:29:21,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827771452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:21,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:21,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:29:21,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222916119] [2021-11-19 04:29:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:21,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:29:21,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:29:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:29:21,764 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-19 04:29:23,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:29:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:23,825 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2021-11-19 04:29:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:29:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 13 [2021-11-19 04:29:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:23,841 INFO L225 Difference]: With dead ends: 64 [2021-11-19 04:29:23,841 INFO L226 Difference]: Without dead ends: 45 [2021-11-19 04:29:23,842 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 [2021-11-19 04:29:23,844 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:23,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:29:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-19 04:29:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-19 04:29:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-11-19 04:29:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2021-11-19 04:29:23,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2021-11-19 04:29:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2021-11-19 04:29:23,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-19 04:29:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2021-11-19 04:29:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:29:23,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:23,865 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:23,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:29:23,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2021-11-19 04:29:23,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:23,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108200356] [2021-11-19 04:29:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:23,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:23,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:23,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136382792] [2021-11-19 04:29:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:23,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:23,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:29:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:29:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:24,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:24,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:24,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108200356] [2021-11-19 04:29:24,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:24,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136382792] [2021-11-19 04:29:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136382792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:24,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:24,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-19 04:29:24,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713132473] [2021-11-19 04:29:24,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:24,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:29:24,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:29:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:24,209 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-11-19 04:29:26,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:29:29,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:29:32,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:29:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:33,402 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2021-11-19 04:29:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:29:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 15 [2021-11-19 04:29:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:33,405 INFO L225 Difference]: With dead ends: 98 [2021-11-19 04:29:33,405 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:29:33,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:29:33,408 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:33,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 229 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2021-11-19 04:29:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:29:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2021-11-19 04:29:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 04:29:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-11-19 04:29:33,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2021-11-19 04:29:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-11-19 04:29:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2021-11-19 04:29:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-11-19 04:29:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:29:33,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:33,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:33,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:33,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:33,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2021-11-19 04:29:33,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:33,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797625897] [2021-11-19 04:29:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:33,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:33,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:33,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537931138] [2021-11-19 04:29:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:33,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:33,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:33,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:29:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:33,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:29:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:33,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:33,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797625897] [2021-11-19 04:29:33,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:33,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537931138] [2021-11-19 04:29:33,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537931138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:33,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:33,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 04:29:33,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988817258] [2021-11-19 04:29:33,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:29:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:29:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:29:33,958 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-11-19 04:29:47,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:29:58,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 11.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:00,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:02,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:07,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:08,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:09,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:12,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:15,132 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:19,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:19,608 INFO L93 Difference]: Finished difference Result 123 states and 171 transitions. [2021-11-19 04:30:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:30:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 16 [2021-11-19 04:30:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:19,614 INFO L225 Difference]: With dead ends: 123 [2021-11-19 04:30:19,614 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 04:30:19,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:30:19,616 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 111 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 19 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:19,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 299 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 102 Invalid, 7 Unknown, 0 Unchecked, 45.6s Time] [2021-11-19 04:30:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 04:30:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2021-11-19 04:30:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 38 states have call successors, (38), 6 states have call predecessors, (38), 6 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-19 04:30:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-11-19 04:30:19,644 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 16 [2021-11-19 04:30:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:19,644 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-11-19 04:30:19,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-11-19 04:30:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-11-19 04:30:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:30:19,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:19,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:19,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:19,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 04:30:19,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2021-11-19 04:30:19,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:19,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255835691] [2021-11-19 04:30:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:19,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:20,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255835691] [2021-11-19 04:30:20,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255835691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914953910] [2021-11-19 04:30:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:20,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:20,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:20,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:30:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:30:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:20,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:20,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914953910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:20,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:20,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-19 04:30:20,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486695191] [2021-11-19 04:30:20,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:30:20,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:30:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:30:20,981 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:28,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:30,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:33,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:36,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:38,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:39,147 INFO L93 Difference]: Finished difference Result 175 states and 257 transitions. [2021-11-19 04:30:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:30:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 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 16 [2021-11-19 04:30:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:39,157 INFO L225 Difference]: With dead ends: 175 [2021-11-19 04:30:39,157 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:30:39,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:30:39,161 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 41 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 85 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:39,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 556 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 287 Invalid, 5 Unknown, 0 Unchecked, 18.0s Time] [2021-11-19 04:30:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:30:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2021-11-19 04:30:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 85 states have internal predecessors, (99), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-19 04:30:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 179 transitions. [2021-11-19 04:30:39,241 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 179 transitions. Word has length 16 [2021-11-19 04:30:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:39,242 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 179 transitions. [2021-11-19 04:30:39,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 179 transitions. [2021-11-19 04:30:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:30:39,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:39,246 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:39,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:39,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1188910040, now seen corresponding path program 1 times [2021-11-19 04:30:39,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:39,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134988597] [2021-11-19 04:30:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:39,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:30:39,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369457489] [2021-11-19 04:30:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:39,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:39,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:39,492 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:30:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:30:39,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:30:39,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:30:39,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:39,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134988597] [2021-11-19 04:30:39,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:30:39,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369457489] [2021-11-19 04:30:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369457489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:30:39,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:30:39,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:30:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658944149] [2021-11-19 04:30:39,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:30:39,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:30:39,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:30:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:30:39,780 INFO L87 Difference]: Start difference. First operand 132 states and 179 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-19 04:30:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:40,575 INFO L93 Difference]: Finished difference Result 138 states and 183 transitions. [2021-11-19 04:30:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:30:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2021-11-19 04:30:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:40,577 INFO L225 Difference]: With dead ends: 138 [2021-11-19 04:30:40,578 INFO L226 Difference]: Without dead ends: 110 [2021-11-19 04:30:40,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:30:40,579 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:40,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:30:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-19 04:30:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-19 04:30:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-19 04:30:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2021-11-19 04:30:40,600 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 23 [2021-11-19 04:30:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:40,600 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2021-11-19 04:30:40,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-19 04:30:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2021-11-19 04:30:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:30:40,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:40,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:40,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:40,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:40,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 206453113, now seen corresponding path program 1 times [2021-11-19 04:30:40,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:40,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370444091] [2021-11-19 04:30:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:40,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:40,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:30:40,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325607897] [2021-11-19 04:30:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:40,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:40,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:40,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:30:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:30:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:30:41,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:30:41,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:41,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370444091] [2021-11-19 04:30:41,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:30:41,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325607897] [2021-11-19 04:30:41,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325607897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:30:41,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:30:41,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:30:41,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459955635] [2021-11-19 04:30:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:30:41,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:30:41,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:30:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:30:41,093 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-19 04:30:43,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:43,391 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2021-11-19 04:30:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:30:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 24 [2021-11-19 04:30:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:43,395 INFO L225 Difference]: With dead ends: 160 [2021-11-19 04:30:43,395 INFO L226 Difference]: Without dead ends: 152 [2021-11-19 04:30:43,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:30:43,397 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:43,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:30:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-19 04:30:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-19 04:30:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 92 states have (on average 1.25) internal successors, (115), 99 states have internal predecessors, (115), 47 states have call successors, (47), 12 states have call predecessors, (47), 12 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-19 04:30:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 204 transitions. [2021-11-19 04:30:43,445 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 204 transitions. Word has length 24 [2021-11-19 04:30:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:43,447 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 204 transitions. [2021-11-19 04:30:43,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-19 04:30:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 204 transitions. [2021-11-19 04:30:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:30:43,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:43,458 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:43,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:30:43,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-19 04:30:43,684 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash -158866305, now seen corresponding path program 1 times [2021-11-19 04:30:43,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:43,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899353125] [2021-11-19 04:30:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:43,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:43,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:30:43,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795109416] [2021-11-19 04:30:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:43,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:43,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:43,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:30:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:30:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:30:43,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:30:43,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:43,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899353125] [2021-11-19 04:30:43,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:30:43,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795109416] [2021-11-19 04:30:43,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795109416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:30:43,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:30:43,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:30:43,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586869032] [2021-11-19 04:30:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:30:43,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:30:43,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:30:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:30:43,992 INFO L87 Difference]: Start difference. First operand 152 states and 204 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-19 04:30:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:44,627 INFO L93 Difference]: Finished difference Result 197 states and 258 transitions. [2021-11-19 04:30:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:30:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2021-11-19 04:30:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:44,631 INFO L225 Difference]: With dead ends: 197 [2021-11-19 04:30:44,631 INFO L226 Difference]: Without dead ends: 192 [2021-11-19 04:30:44,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:30:44,632 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:44,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 140 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:30:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-19 04:30:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2021-11-19 04:30:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 114 states have internal predecessors, (126), 57 states have call successors, (57), 18 states have call predecessors, (57), 18 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-19 04:30:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 236 transitions. [2021-11-19 04:30:44,657 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 236 transitions. Word has length 26 [2021-11-19 04:30:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:44,657 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 236 transitions. [2021-11-19 04:30:44,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-11-19 04:30:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 236 transitions. [2021-11-19 04:30:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:30:44,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:44,659 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:44,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:44,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:44,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639676, now seen corresponding path program 1 times [2021-11-19 04:30:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:44,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656204893] [2021-11-19 04:30:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:44,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:45,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:45,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656204893] [2021-11-19 04:30:45,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656204893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:45,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574573763] [2021-11-19 04:30:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:45,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:45,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:45,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:30:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:30:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:45,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:45,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574573763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:45,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:45,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2021-11-19 04:30:45,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163559295] [2021-11-19 04:30:45,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:45,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:30:45,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:30:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:30:45,433 INFO L87 Difference]: Start difference. First operand 184 states and 236 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2021-11-19 04:30:47,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:50,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:54,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:30:56,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:58,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:31:02,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 04:31:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:31:06,821 INFO L93 Difference]: Finished difference Result 505 states and 662 transitions. [2021-11-19 04:31:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:31:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 24 [2021-11-19 04:31:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:31:06,826 INFO L225 Difference]: With dead ends: 505 [2021-11-19 04:31:06,827 INFO L226 Difference]: Without dead ends: 454 [2021-11-19 04:31:06,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:31:06,829 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 212 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 66 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:31:06,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 396 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 187 Invalid, 5 Unknown, 0 Unchecked, 21.2s Time] [2021-11-19 04:31:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-19 04:31:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 431. [2021-11-19 04:31:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 245 states have (on average 1.2) internal successors, (294), 260 states have internal predecessors, (294), 141 states have call successors, (141), 44 states have call predecessors, (141), 44 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2021-11-19 04:31:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 564 transitions. [2021-11-19 04:31:06,881 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 564 transitions. Word has length 24 [2021-11-19 04:31:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:06,881 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 564 transitions. [2021-11-19 04:31:06,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2021-11-19 04:31:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 564 transitions. [2021-11-19 04:31:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:31:06,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:06,885 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:06,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:31:07,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:07,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1271100124, now seen corresponding path program 2 times [2021-11-19 04:31:07,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:07,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101431095] [2021-11-19 04:31:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:07,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:31:07,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:31:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101431095] [2021-11-19 04:31:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101431095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:31:07,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460428748] [2021-11-19 04:31:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:31:07,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:31:07,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:31:07,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:31:07,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 04:31:07,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:31:07,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:31:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:31:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-19 04:31:07,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:31:07,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460428748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:31:07,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:31:07,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2021-11-19 04:31:07,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261298080] [2021-11-19 04:31:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:31:07,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:31:07,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:31:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:31:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:31:07,606 INFO L87 Difference]: Start difference. First operand 431 states and 564 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-19 04:31:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:31:07,693 INFO L93 Difference]: Finished difference Result 479 states and 633 transitions. [2021-11-19 04:31:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:31:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 42 [2021-11-19 04:31:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:31:07,698 INFO L225 Difference]: With dead ends: 479 [2021-11-19 04:31:07,699 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 04:31:07,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:31:07,701 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:31:07,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:31:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 04:31:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 311. [2021-11-19 04:31:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 180 states have (on average 1.1722222222222223) internal successors, (211), 190 states have internal predecessors, (211), 96 states have call successors, (96), 34 states have call predecessors, (96), 34 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-19 04:31:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 395 transitions. [2021-11-19 04:31:07,742 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 395 transitions. Word has length 42 [2021-11-19 04:31:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:07,743 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 395 transitions. [2021-11-19 04:31:07,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-19 04:31:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 395 transitions. [2021-11-19 04:31:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:31:07,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:07,746 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:07,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-19 04:31:07,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:07,956 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:07,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2047122003, now seen corresponding path program 1 times [2021-11-19 04:31:07,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:07,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850208724] [2021-11-19 04:31:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:07,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:07,967 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:31:07,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969793667] [2021-11-19 04:31:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:07,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:31:07,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:31:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5b68aa7-d19c-4d2f-a3d7-cbc4275d275f/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process