./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i --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_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:02:56,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:02:56,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:02:56,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:02:56,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:02:56,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:02:56,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:02:56,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:02:56,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:02:56,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:02:56,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:02:56,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:02:56,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:02:56,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:02:56,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:02:56,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:02:56,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:02:56,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:02:56,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:02:56,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:02:56,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:02:56,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:02:56,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:02:56,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:02:56,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:02:56,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:02:56,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:02:56,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:02:56,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:02:56,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:02:56,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:02:56,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:02:56,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:02:56,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:02:56,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:02:56,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:02:56,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:02:56,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:02:56,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:02:56,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:02:56,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:02:56,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:02:56,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:02:56,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:02:56,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:02:56,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:02:56,243 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:02:56,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:02:56,244 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:02:56,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:02:56,244 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:02:56,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:02:56,246 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:02:56,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:02:56,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:02:56,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:02:56,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:02:56,247 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:02:56,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:02:56,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:02:56,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:02:56,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:02:56,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:02:56,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:02:56,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:02:56,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:02:56,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:02:56,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:02:56,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:02:56,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:02:56,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:02:56,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:02:56,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:02:56,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:02:56,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:02:56,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:02:56,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:02:56,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 [2021-11-19 14:02:56,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:02:56,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:02:56,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:02:56,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:02:56,601 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:02:56,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2021-11-19 14:02:56,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/4fe93f7c5/17737843a4f54b72acf5887195d1a3c9/FLAG7f4110c6c [2021-11-19 14:02:57,360 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:02:57,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2021-11-19 14:02:57,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/4fe93f7c5/17737843a4f54b72acf5887195d1a3c9/FLAG7f4110c6c [2021-11-19 14:02:57,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/4fe93f7c5/17737843a4f54b72acf5887195d1a3c9 [2021-11-19 14:02:57,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:02:57,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:02:57,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:02:57,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:02:57,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:02:57,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:02:57" (1/1) ... [2021-11-19 14:02:57,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ded35f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:02:57, skipping insertion in model container [2021-11-19 14:02:57,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:02:57" (1/1) ... [2021-11-19 14:02:57,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:02:57,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:02:58,067 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_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2021-11-19 14:02:58,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:02:58,270 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:02:58,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f549aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:02:58, skipping insertion in model container [2021-11-19 14:02:58,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:02:58,272 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:02:58,273 INFO L158 Benchmark]: Toolchain (without parser) took 701.93ms. Allocated memory is still 96.5MB. Free memory was 59.7MB in the beginning and 61.3MB in the end (delta: -1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:02:58,274 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 75.5MB. Free memory was 49.4MB in the beginning and 49.3MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:02:58,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 699.32ms. Allocated memory is still 96.5MB. Free memory was 59.5MB in the beginning and 61.3MB in the end (delta: -1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:02:58,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 75.5MB. Free memory was 49.4MB in the beginning and 49.3MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 699.32ms. Allocated memory is still 96.5MB. Free memory was 59.5MB in the beginning and 61.3MB in the end (delta: -1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:00,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:00,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:00,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:00,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:00,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:00,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:00,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:00,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:00,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:00,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:00,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:00,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:00,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:00,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:00,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:00,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:00,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:00,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:00,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:00,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:00,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:00,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:00,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:00,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:00,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:00,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:00,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:00,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:00,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:00,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:00,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:00,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:00,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:00,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:00,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:00,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:00,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:00,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:00,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:00,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:00,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:03:00,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:00,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:00,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:00,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:00,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:00,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:00,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:00,869 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:00,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:00,869 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:00,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:00,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:03:00,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:03:00,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:00,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:00,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:00,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:00,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:00,873 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:03:00,873 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:03:00,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:03:00,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:00,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:00,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:00,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:00,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:03:00,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:00,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:00,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:00,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:00,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:00,876 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:03:00,876 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:00,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:00,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:00,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:00,877 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fff6eb11b5ece9f2655331435003a1af77ee5ac869f244677acc531eb435a19 [2021-11-19 14:03:01,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:01,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:01,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:01,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:01,353 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:01,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2021-11-19 14:03:01,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/c21c6409b/08d6f179b5df4c668cf7b84e2b8d8363/FLAG927b1f9c1 [2021-11-19 14:03:02,158 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:02,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i [2021-11-19 14:03:02,185 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/c21c6409b/08d6f179b5df4c668cf7b84e2b8d8363/FLAG927b1f9c1 [2021-11-19 14:03:02,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/data/c21c6409b/08d6f179b5df4c668cf7b84e2b8d8363 [2021-11-19 14:03:02,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:02,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:02,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:02,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:02,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:02,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:02" (1/1) ... [2021-11-19 14:03:02,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c320b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:02, skipping insertion in model container [2021-11-19 14:03:02,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:02" (1/1) ... [2021-11-19 14:03:02,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:02,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:03,015 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_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2021-11-19 14:03:03,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:03,220 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:03:03,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:03,278 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_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2021-11-19 14:03:03,401 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:03,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:03:03,438 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_a386d2e8-18e6-42e6-aa34-b48c9e308434/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test4-2.i[33021,33034] [2021-11-19 14:03:03,524 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:03,582 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:03:03,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03 WrapperNode [2021-11-19 14:03:03,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:03,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:03,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:03:03,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:03:03,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,797 INFO L137 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1309 [2021-11-19 14:03:03,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:03,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:03:03,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:03:03,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:03:03,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:03:03,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:03:03,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:03:03,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:03:03,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (1/1) ... [2021-11-19 14:03:03,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:04,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:04,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:03:04,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:03:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:03:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:03:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:03:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:03:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:03:04,084 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:03:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:03:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:03:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:03:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:03:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:03:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:03:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:03:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:03:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:03:04,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:03:04,525 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:03:04,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:03:15,300 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:03:15,311 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:03:15,311 INFO L301 CfgBuilder]: Removed 69 assume(true) statements. [2021-11-19 14:03:15,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:15 BoogieIcfgContainer [2021-11-19 14:03:15,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:03:15,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:03:15,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:03:15,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:03:15,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:03:02" (1/3) ... [2021-11-19 14:03:15,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76324266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:15, skipping insertion in model container [2021-11-19 14:03:15,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:03" (2/3) ... [2021-11-19 14:03:15,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76324266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:15, skipping insertion in model container [2021-11-19 14:03:15,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:15" (3/3) ... [2021-11-19 14:03:15,323 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test4-2.i [2021-11-19 14:03:15,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:03:15,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:03:15,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:03:15,388 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=FINITE_AUTOMATA, 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 14:03:15,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:03:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 14:03:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 14:03:15,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:15,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:15,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1526554564, now seen corresponding path program 1 times [2021-11-19 14:03:15,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:15,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173614936] [2021-11-19 14:03:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:15,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:15,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:15,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:15,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:03:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:03:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:15,765 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 14:03:15,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:15,816 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 14:03:15,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:15,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173614936] [2021-11-19 14:03:15,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173614936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:15,818 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:15,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:03:15,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825799452] [2021-11-19 14:03:15,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:15,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:03:15,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:03:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:03:15,871 INFO L87 Difference]: Start difference. First operand has 240 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 231 states have internal predecessors, (370), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 14:03:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:16,445 INFO L93 Difference]: Finished difference Result 649 states and 1106 transitions. [2021-11-19 14:03:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:03:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 10 [2021-11-19 14:03:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:16,471 INFO L225 Difference]: With dead ends: 649 [2021-11-19 14:03:16,471 INFO L226 Difference]: Without dead ends: 378 [2021-11-19 14:03:16,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:03:16,486 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 604 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:16,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 671 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:03:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-19 14:03:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-19 14:03:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 363 states have internal predecessors, (462), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:03:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 506 transitions. [2021-11-19 14:03:16,569 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 506 transitions. Word has length 10 [2021-11-19 14:03:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:16,569 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 506 transitions. [2021-11-19 14:03:16,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 14:03:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 506 transitions. [2021-11-19 14:03:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 14:03:16,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:16,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:16,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:16,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:16,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:16,801 INFO L85 PathProgramCache]: Analyzing trace with hash 928072590, now seen corresponding path program 1 times [2021-11-19 14:03:16,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:16,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910850510] [2021-11-19 14:03:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:16,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:16,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:16,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:16,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:03:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:03:18,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:03:18,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910850510] [2021-11-19 14:03:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910850510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:18,636 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:18,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:03:18,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590289622] [2021-11-19 14:03:18,636 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:18,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:03:18,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:03:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:03:18,640 INFO L87 Difference]: Start difference. First operand 378 states and 506 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 14:03:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:18,786 INFO L93 Difference]: Finished difference Result 756 states and 1018 transitions. [2021-11-19 14:03:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:03:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 206 [2021-11-19 14:03:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:18,790 INFO L225 Difference]: With dead ends: 756 [2021-11-19 14:03:18,791 INFO L226 Difference]: Without dead ends: 386 [2021-11-19 14:03:18,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:18,794 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:18,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 567 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-19 14:03:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2021-11-19 14:03:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 369 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:03:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 496 transitions. [2021-11-19 14:03:18,832 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 496 transitions. Word has length 206 [2021-11-19 14:03:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:18,833 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 496 transitions. [2021-11-19 14:03:18,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 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 14:03:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 496 transitions. [2021-11-19 14:03:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 14:03:18,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:18,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:18,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:19,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:19,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:19,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2109605494, now seen corresponding path program 1 times [2021-11-19 14:03:19,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:19,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999874449] [2021-11-19 14:03:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:19,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:19,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:03:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:03:20,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:03:21,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:21,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999874449] [2021-11-19 14:03:21,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999874449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:21,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:21,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:03:21,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416599317] [2021-11-19 14:03:21,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:21,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:21,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:21,188 INFO L87 Difference]: Start difference. First operand 384 states and 496 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:03:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:21,728 INFO L93 Difference]: Finished difference Result 713 states and 930 transitions. [2021-11-19 14:03:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 206 [2021-11-19 14:03:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:21,741 INFO L225 Difference]: With dead ends: 713 [2021-11-19 14:03:21,741 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 14:03:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:21,743 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 11 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:21,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 523 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:03:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 14:03:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2021-11-19 14:03:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 357 states have (on average 1.257703081232493) internal successors, (449), 367 states have internal predecessors, (449), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 14:03:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 493 transitions. [2021-11-19 14:03:21,802 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 493 transitions. Word has length 206 [2021-11-19 14:03:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:21,803 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 493 transitions. [2021-11-19 14:03:21,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 14:03:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 493 transitions. [2021-11-19 14:03:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 14:03:21,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:21,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:21,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:22,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:22,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1460062505, now seen corresponding path program 1 times [2021-11-19 14:03:22,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:22,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842415152] [2021-11-19 14:03:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:22,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:22,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:22,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:22,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:03:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:03:23,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:03:23,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:23,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842415152] [2021-11-19 14:03:23,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842415152] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:03:23,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:03:23,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:03:23,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068271648] [2021-11-19 14:03:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:23,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:03:23,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:03:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:23,636 INFO L87 Difference]: Start difference. First operand 382 states and 493 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:03:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:23,721 INFO L93 Difference]: Finished difference Result 720 states and 949 transitions. [2021-11-19 14:03:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:03:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 221 [2021-11-19 14:03:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:23,725 INFO L225 Difference]: With dead ends: 720 [2021-11-19 14:03:23,725 INFO L226 Difference]: Without dead ends: 385 [2021-11-19 14:03:23,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:03:23,727 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 2 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:23,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-19 14:03:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-19 14:03:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 359 states have (on average 1.2590529247910864) internal successors, (452), 370 states have internal predecessors, (452), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:03:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 500 transitions. [2021-11-19 14:03:23,752 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 500 transitions. Word has length 221 [2021-11-19 14:03:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:23,753 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 500 transitions. [2021-11-19 14:03:23,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:03:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 500 transitions. [2021-11-19 14:03:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 14:03:23,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:23,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:23,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:23,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:23,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:23,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1064918201, now seen corresponding path program 1 times [2021-11-19 14:03:23,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:23,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441940179] [2021-11-19 14:03:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:23,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:23,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:23,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:03:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:03:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:03:25,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:25,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441940179] [2021-11-19 14:03:25,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441940179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:25,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18390656] [2021-11-19 14:03:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:25,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:25,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:25,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:25,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:03:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:26,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:03:26,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:03:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18390656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:27,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [5, 5] total 14 [2021-11-19 14:03:27,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493620814] [2021-11-19 14:03:27,714 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:27,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:03:27,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:03:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:27,716 INFO L87 Difference]: Start difference. First operand 385 states and 500 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 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 14:03:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:27,942 INFO L93 Difference]: Finished difference Result 698 states and 921 transitions. [2021-11-19 14:03:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:03:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 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 223 [2021-11-19 14:03:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:27,949 INFO L225 Difference]: With dead ends: 698 [2021-11-19 14:03:27,949 INFO L226 Difference]: Without dead ends: 405 [2021-11-19 14:03:27,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:27,953 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 414 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 784 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:03:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-19 14:03:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 403. [2021-11-19 14:03:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 377 states have (on average 1.220159151193634) internal successors, (460), 388 states have internal predecessors, (460), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:03:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 508 transitions. [2021-11-19 14:03:27,981 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 508 transitions. Word has length 223 [2021-11-19 14:03:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:27,983 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 508 transitions. [2021-11-19 14:03:27,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 2 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 14:03:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 508 transitions. [2021-11-19 14:03:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 14:03:27,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:27,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:27,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:28,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:28,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:28,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1682177333, now seen corresponding path program 1 times [2021-11-19 14:03:28,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:28,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729465506] [2021-11-19 14:03:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:28,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:28,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:28,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:03:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 14:03:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:03:30,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:30,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729465506] [2021-11-19 14:03:30,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729465506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:30,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548275430] [2021-11-19 14:03:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:30,089 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:30,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:30,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:03:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:30,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:03:32,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:03:33,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1548275430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:33,852 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:33,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:03:33,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130413685] [2021-11-19 14:03:33,853 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:33,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:33,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:03:33,855 INFO L87 Difference]: Start difference. First operand 403 states and 508 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 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 14:03:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:34,281 INFO L93 Difference]: Finished difference Result 661 states and 842 transitions. [2021-11-19 14:03:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 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 223 [2021-11-19 14:03:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:34,285 INFO L225 Difference]: With dead ends: 661 [2021-11-19 14:03:34,286 INFO L226 Difference]: Without dead ends: 401 [2021-11-19 14:03:34,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:03:34,288 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:34,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 509 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:03:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-19 14:03:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-19 14:03:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 386 states have internal predecessors, (457), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:03:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 505 transitions. [2021-11-19 14:03:34,309 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 505 transitions. Word has length 223 [2021-11-19 14:03:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:34,309 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 505 transitions. [2021-11-19 14:03:34,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 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 14:03:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 505 transitions. [2021-11-19 14:03:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:03:34,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:34,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:34,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:34,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:34,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:34,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1224425174, now seen corresponding path program 1 times [2021-11-19 14:03:34,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:34,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287803929] [2021-11-19 14:03:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:34,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:34,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:34,741 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:34,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:03:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:35,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:03:35,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:03:36,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:36,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287803929] [2021-11-19 14:03:36,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287803929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:36,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342592902] [2021-11-19 14:03:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:36,279 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:36,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:36,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:03:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:36,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-19 14:03:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 14:03:37,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342592902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:37,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:37,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-19 14:03:37,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835113589] [2021-11-19 14:03:37,775 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:37,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:03:37,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:03:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:03:37,777 INFO L87 Difference]: Start difference. First operand 401 states and 505 transitions. Second operand has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:03:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:37,879 INFO L93 Difference]: Finished difference Result 671 states and 853 transitions. [2021-11-19 14:03:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:03:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2021-11-19 14:03:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:37,883 INFO L225 Difference]: With dead ends: 671 [2021-11-19 14:03:37,883 INFO L226 Difference]: Without dead ends: 377 [2021-11-19 14:03:37,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:03:37,888 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 215 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:37,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 924 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-19 14:03:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-19 14:03:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 351 states have (on average 1.1937321937321936) internal successors, (419), 362 states have internal predecessors, (419), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (26), 13 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-19 14:03:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 467 transitions. [2021-11-19 14:03:37,908 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 467 transitions. Word has length 240 [2021-11-19 14:03:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:37,908 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 467 transitions. [2021-11-19 14:03:37,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.285714285714285) internal successors, (191), 7 states have internal predecessors, (191), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:03:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 467 transitions. [2021-11-19 14:03:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-19 14:03:37,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:37,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:37,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:38,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:38,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:38,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash -40719530, now seen corresponding path program 1 times [2021-11-19 14:03:38,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:38,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101130512] [2021-11-19 14:03:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:38,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:38,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:38,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:38,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:03:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:03:39,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:03:39,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:39,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101130512] [2021-11-19 14:03:39,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101130512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:39,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513023366] [2021-11-19 14:03:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:39,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:39,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:39,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:03:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 14:03:41,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:03:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513023366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557776952] [2021-11-19 14:03:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:41,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:03:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:41,764 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:03:41,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:03:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:03:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:03:43,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557776952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:43,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:03:43,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-19 14:03:43,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563917127] [2021-11-19 14:03:43,959 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:03:43,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:03:43,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:03:43,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:43,963 INFO L87 Difference]: Start difference. First operand 377 states and 467 transitions. Second operand has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:03:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:47,602 INFO L93 Difference]: Finished difference Result 1398 states and 1773 transitions. [2021-11-19 14:03:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:03:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 240 [2021-11-19 14:03:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:47,611 INFO L225 Difference]: With dead ends: 1398 [2021-11-19 14:03:47,612 INFO L226 Difference]: Without dead ends: 1068 [2021-11-19 14:03:47,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:03:47,614 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1991 mSDsluCounter, 4793 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2027 SdHoareTripleChecker+Valid, 5423 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:47,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2027 Valid, 5423 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 14:03:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-19 14:03:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1066. [2021-11-19 14:03:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1015 states have (on average 1.1832512315270935) internal successors, (1201), 1026 states have internal predecessors, (1201), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-19 14:03:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1305 transitions. [2021-11-19 14:03:47,665 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1305 transitions. Word has length 240 [2021-11-19 14:03:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:47,666 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1305 transitions. [2021-11-19 14:03:47,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.142857142857146) internal successors, (590), 14 states have internal predecessors, (590), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:03:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1305 transitions. [2021-11-19 14:03:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2021-11-19 14:03:47,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:47,701 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:47,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:47,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:48,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:48,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:48,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:48,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1877096522, now seen corresponding path program 2 times [2021-11-19 14:03:48,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:48,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369762903] [2021-11-19 14:03:48,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:48,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:48,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:48,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:03:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:03:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:03:51,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:03:52,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369762903] [2021-11-19 14:03:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369762903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28727089] [2021-11-19 14:03:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:52,706 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:52,707 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:03:54,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:03:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-19 14:03:55,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-19 14:03:57,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28727089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:57,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097072029] [2021-11-19 14:03:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:03:57,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:03:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:57,318 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:03:57,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:03:58,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:03:58,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:03:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-19 14:03:59,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-19 14:04:01,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097072029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:01,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:04:01,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-19 14:04:01,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99712254] [2021-11-19 14:04:01,431 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:04:01,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:04:01,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:04:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:04:01,435 INFO L87 Difference]: Start difference. First operand 1066 states and 1305 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:04:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:03,223 INFO L93 Difference]: Finished difference Result 2111 states and 2721 transitions. [2021-11-19 14:04:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:04:03,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 640 [2021-11-19 14:04:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:03,232 INFO L225 Difference]: With dead ends: 2111 [2021-11-19 14:04:03,232 INFO L226 Difference]: Without dead ends: 1086 [2021-11-19 14:04:03,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3859 GetRequests, 3816 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:04:03,236 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 136 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:03,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2211 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:04:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-19 14:04:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1078. [2021-11-19 14:04:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1027 states have (on average 1.1850048685491723) internal successors, (1217), 1038 states have internal predecessors, (1217), 46 states have call successors, (46), 3 states have call predecessors, (46), 4 states have return successors, (58), 37 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-19 14:04:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1321 transitions. [2021-11-19 14:04:03,294 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1321 transitions. Word has length 640 [2021-11-19 14:04:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:03,295 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1321 transitions. [2021-11-19 14:04:03,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.5) internal successors, (190), 20 states have internal predecessors, (190), 2 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:04:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1321 transitions. [2021-11-19 14:04:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-19 14:04:03,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:03,314 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:03,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:03,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:03,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-19 14:04:03,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:03,929 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -357579338, now seen corresponding path program 3 times [2021-11-19 14:04:03,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:03,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330065563] [2021-11-19 14:04:03,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:04:03,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:03,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:03,936 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:03,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a386d2e8-18e6-42e6-aa34-b48c9e308434/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process