./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.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_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/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_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/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_3c8175c7-9d31-4761-9e25-5bde8af76433/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 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:13,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:13,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:13,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:13,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:13,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:13,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:13,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:13,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:13,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:13,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:13,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:13,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:13,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:13,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:13,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:13,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:13,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:13,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:13,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:13,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:13,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:13,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:13,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:13,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:13,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:13,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:13,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:13,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:13,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:13,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:13,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:13,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:13,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:13,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:13,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:13,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:13,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:13,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:13,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:13,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:13,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:13,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:13,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:13,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:13,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:13,196 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:13,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:13,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:13,198 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:13,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:13,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:13,198 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:13,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:13,199 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:13,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:13,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:13,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:13,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:13,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:13,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:13,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:13,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:13,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:13,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:13,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:13,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:13,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:13,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:13,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:13,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:13,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:13,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:13,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:13,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:13,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:13,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:13,204 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_3c8175c7-9d31-4761-9e25-5bde8af76433/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f [2021-11-19 14:16:13,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:13,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:13,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:13,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:13,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:13,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2021-11-19 14:16:13,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/5023b58dc/1e7adba159a8442086f53308682d1f91/FLAG8bfe10c4e [2021-11-19 14:16:14,190 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:14,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2021-11-19 14:16:14,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/5023b58dc/1e7adba159a8442086f53308682d1f91/FLAG8bfe10c4e [2021-11-19 14:16:14,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/5023b58dc/1e7adba159a8442086f53308682d1f91 [2021-11-19 14:16:14,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:14,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:14,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:14,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:14,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:14,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:14" (1/1) ... [2021-11-19 14:16:14,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705bbd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:14, skipping insertion in model container [2021-11-19 14:16:14,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:14" (1/1) ... [2021-11-19 14:16:14,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:14,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:15,063 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2021-11-19 14:16:15,074 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2021-11-19 14:16:15,223 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2021-11-19 14:16:15,225 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2021-11-19 14:16:15,234 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:15,244 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 14:16:15,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d78e8b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:15, skipping insertion in model container [2021-11-19 14:16:15,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:15,246 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:15,248 INFO L158 Benchmark]: Toolchain (without parser) took 845.28ms. Allocated memory is still 102.8MB. Free memory was 63.2MB in the beginning and 66.1MB in the end (delta: -2.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:16:15,249 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 102.8MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:15,250 INFO L158 Benchmark]: CACSL2BoogieTranslator took 842.45ms. Allocated memory is still 102.8MB. Free memory was 63.0MB in the beginning and 66.6MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:16:15,252 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 102.8MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 842.45ms. Allocated memory is still 102.8MB. Free memory was 63.0MB in the beginning and 66.6MB in the end (delta: -3.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/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_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/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_3c8175c7-9d31-4761-9e25-5bde8af76433/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 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:17,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:17,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:17,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:17,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:17,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:17,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:17,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:17,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:17,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:17,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:17,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:17,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:17,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:17,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:17,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:17,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:17,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:17,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:17,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:17,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:17,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:17,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:17,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:17,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:17,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:17,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:17,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:17,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:17,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:17,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:17,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:17,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:17,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:17,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:17,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:17,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:17,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:17,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:17,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:17,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:17,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:17,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:17,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:17,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:17,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:17,707 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:17,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:17,707 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:17,707 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:17,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:17,708 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:17,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:17,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:17,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:17,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:17,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:17,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:17,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:17,711 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:17,711 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:17,711 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:17,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:17,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:17,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:17,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:17,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:17,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:17,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:17,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:17,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:17,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:17,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:17,714 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:17,714 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:17,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:17,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:17,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:17,715 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_3c8175c7-9d31-4761-9e25-5bde8af76433/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8374eced2cbda6aab489eb004cb8e41f23aad88b98cd5c6913f13583171f2c3f [2021-11-19 14:16:18,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:18,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:18,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:18,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:18,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:18,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2021-11-19 14:16:18,274 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/998cd0673/0e7b559b2e95470d8721d50a18d1da08/FLAGb180c111f [2021-11-19 14:16:19,100 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:19,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i [2021-11-19 14:16:19,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/998cd0673/0e7b559b2e95470d8721d50a18d1da08/FLAGb180c111f [2021-11-19 14:16:19,232 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/data/998cd0673/0e7b559b2e95470d8721d50a18d1da08 [2021-11-19 14:16:19,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:19,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:19,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:19,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:19,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:19,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:19" (1/1) ... [2021-11-19 14:16:19,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b440f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:19, skipping insertion in model container [2021-11-19 14:16:19,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:19" (1/1) ... [2021-11-19 14:16:19,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:19,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:19,907 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2021-11-19 14:16:19,922 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2021-11-19 14:16:20,090 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2021-11-19 14:16:20,092 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2021-11-19 14:16:20,100 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:20,113 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:20,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:20,178 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2021-11-19 14:16:20,182 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2021-11-19 14:16:20,294 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2021-11-19 14:16:20,295 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2021-11-19 14:16:20,299 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:20,323 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:20,358 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44118,44131] [2021-11-19 14:16:20,361 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[44660,44673] [2021-11-19 14:16:20,427 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56247,56260] [2021-11-19 14:16:20,428 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_3c8175c7-9d31-4761-9e25-5bde8af76433/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test6-1.i[56368,56381] [2021-11-19 14:16:20,431 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:20,502 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:20,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20 WrapperNode [2021-11-19 14:16:20,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:20,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:20,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:20,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:20,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,653 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1038 [2021-11-19 14:16:20,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:20,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:20,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:20,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:20,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:20,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:20,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:20,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:20,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (1/1) ... [2021-11-19 14:16:20,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:20,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:20,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:20,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:16:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:16:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:16:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:16:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:16:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:16:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:16:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-19 14:16:20,935 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-19 14:16:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 14:16:20,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 14:16:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:16:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-19 14:16:20,936 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-19 14:16:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:16:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-19 14:16:20,937 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-19 14:16:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:20,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:21,261 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:21,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:28,216 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:28,227 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:28,231 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 14:16:28,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:28 BoogieIcfgContainer [2021-11-19 14:16:28,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:28,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:28,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:28,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:28,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:19" (1/3) ... [2021-11-19 14:16:28,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535b735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:28, skipping insertion in model container [2021-11-19 14:16:28,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:20" (2/3) ... [2021-11-19 14:16:28,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535b735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:28, skipping insertion in model container [2021-11-19 14:16:28,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:28" (3/3) ... [2021-11-19 14:16:28,250 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test6-1.i [2021-11-19 14:16:28,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:28,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 14:16:28,334 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:28,340 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 14:16:28,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 14:16:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 14:16:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:16:28,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:28,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:28,375 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-19 14:16:28,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:28,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869772071] [2021-11-19 14:16:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:28,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:28,395 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:28,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:16:28,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:28,648 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 14:16:28,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:28,673 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 14:16:28,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:28,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869772071] [2021-11-19 14:16:28,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869772071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:28,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:28,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:16:28,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656739532] [2021-11-19 14:16:28,679 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:28,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:16:28,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:16:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:28,715 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:28,774 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-19 14:16:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:16:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 14:16:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:28,806 INFO L225 Difference]: With dead ends: 445 [2021-11-19 14:16:28,807 INFO L226 Difference]: Without dead ends: 218 [2021-11-19 14:16:28,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:28,816 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:28,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-19 14:16:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-19 14:16:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 14:16:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-19 14:16:28,934 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-19 14:16:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:28,934 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-19 14:16:28,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-19 14:16:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 14:16:28,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:28,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:28,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:29,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:29,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-19 14:16:29,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:29,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650050245] [2021-11-19 14:16:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:29,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:29,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:29,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:29,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:29,529 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 14:16:29,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:29,631 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 14:16:29,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650050245] [2021-11-19 14:16:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650050245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:29,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:29,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:16:29,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193980940] [2021-11-19 14:16:29,633 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:29,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:29,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:29,638 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:32,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:16:34,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:34,341 INFO L93 Difference]: Finished difference Result 551 states and 718 transitions. [2021-11-19 14:16:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:34,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 14:16:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:34,347 INFO L225 Difference]: With dead ends: 551 [2021-11-19 14:16:34,347 INFO L226 Difference]: Without dead ends: 335 [2021-11-19 14:16:34,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:34,351 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:34,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 751 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:16:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-19 14:16:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 325. [2021-11-19 14:16:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 304 states have (on average 1.3092105263157894) internal successors, (398), 309 states have internal predecessors, (398), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 14:16:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-19 14:16:34,382 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 10 [2021-11-19 14:16:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:34,383 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-19 14:16:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-19 14:16:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 14:16:34,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:34,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:34,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:16:34,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:34,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1199048252, now seen corresponding path program 1 times [2021-11-19 14:16:34,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:34,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258662146] [2021-11-19 14:16:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:34,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:34,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:34,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:34,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:34,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:34,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:34,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:34,961 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:16:34,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:16:35,045 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:16:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 14:16:35,091 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 14:16:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:35,178 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 14:16:35,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:35,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258662146] [2021-11-19 14:16:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258662146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:35,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:35,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:16:35,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277880443] [2021-11-19 14:16:35,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:35,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:35,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:35,181 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 14:16:39,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:16:41,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:16:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:45,761 INFO L93 Difference]: Finished difference Result 664 states and 870 transitions. [2021-11-19 14:16:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 14:16:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:45,769 INFO L225 Difference]: With dead ends: 664 [2021-11-19 14:16:45,770 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 14:16:45,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:16:45,782 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 229 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:45,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1226 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-19 14:16:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 14:16:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 324. [2021-11-19 14:16:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 303 states have (on average 1.306930693069307) internal successors, (396), 308 states have internal predecessors, (396), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 14:16:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2021-11-19 14:16:45,816 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 13 [2021-11-19 14:16:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:45,816 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2021-11-19 14:16:45,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 14:16:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2021-11-19 14:16:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:16:45,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:45,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:45,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:46,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-19 14:16:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:46,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560865445] [2021-11-19 14:16:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:46,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:46,466 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 14:16:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:46,607 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 14:16:46,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:46,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560865445] [2021-11-19 14:16:46,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560865445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:46,608 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:46,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:16:46,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190090305] [2021-11-19 14:16:46,609 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:46,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:46,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:46,610 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:46,771 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2021-11-19 14:16:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 14:16:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:46,775 INFO L225 Difference]: With dead ends: 646 [2021-11-19 14:16:46,775 INFO L226 Difference]: Without dead ends: 332 [2021-11-19 14:16:46,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 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 14:16:46,781 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 220 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 595 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 14:16:46,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 595 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-19 14:16:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-19 14:16:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 309 states have (on average 1.249190938511327) internal successors, (386), 314 states have internal predecessors, (386), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 14:16:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 411 transitions. [2021-11-19 14:16:46,825 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 411 transitions. Word has length 47 [2021-11-19 14:16:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:46,825 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 411 transitions. [2021-11-19 14:16:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 411 transitions. [2021-11-19 14:16:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:16:46,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:46,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:47,054 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-19 14:16:47,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:47,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802477627] [2021-11-19 14:16:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:47,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:47,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:16:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:47,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,455 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 14:16:47,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:47,593 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 14:16:47,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:47,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802477627] [2021-11-19 14:16:47,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802477627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:47,594 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:47,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:16:47,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431107830] [2021-11-19 14:16:47,594 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:47,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:47,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:47,596 INFO L87 Difference]: Start difference. First operand 330 states and 411 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:47,760 INFO L93 Difference]: Finished difference Result 342 states and 423 transitions. [2021-11-19 14:16:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 14:16:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:47,764 INFO L225 Difference]: With dead ends: 342 [2021-11-19 14:16:47,765 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 14:16:47,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:16:47,766 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 19 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:47,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1319 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 14:16:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-19 14:16:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 316 states have (on average 1.2468354430379747) internal successors, (394), 322 states have internal predecessors, (394), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 14:16:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 421 transitions. [2021-11-19 14:16:47,786 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 421 transitions. Word has length 47 [2021-11-19 14:16:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:47,787 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 421 transitions. [2021-11-19 14:16:47,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 421 transitions. [2021-11-19 14:16:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:16:47,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:47,790 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:47,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:48,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:48,006 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-19 14:16:48,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:48,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259897865] [2021-11-19 14:16:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:48,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:48,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:48,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:16:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:48,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:48,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:48,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259897865] [2021-11-19 14:16:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259897865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:48,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:48,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 14:16:48,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145536571] [2021-11-19 14:16:48,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:48,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:16:48,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:48,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:16:48,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:16:49,000 INFO L87 Difference]: Start difference. First operand 340 states and 421 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:16:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:49,339 INFO L93 Difference]: Finished difference Result 647 states and 811 transitions. [2021-11-19 14:16:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-19 14:16:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:49,345 INFO L225 Difference]: With dead ends: 647 [2021-11-19 14:16:49,345 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 14:16:49,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:16:49,347 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 71 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:49,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1211 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:16:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 14:16:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-11-19 14:16:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 325 states have internal predecessors, (396), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-19 14:16:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-19 14:16:49,381 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 62 [2021-11-19 14:16:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:49,384 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-19 14:16:49,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:16:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-19 14:16:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 14:16:49,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:49,389 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:49,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:49,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2017357497, now seen corresponding path program 1 times [2021-11-19 14:16:49,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:49,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179497385] [2021-11-19 14:16:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:49,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:49,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:16:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:50,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:50,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179497385] [2021-11-19 14:16:50,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179497385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:50,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:50,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:16:50,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579359382] [2021-11-19 14:16:50,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:50,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:50,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:50,366 INFO L87 Difference]: Start difference. First operand 344 states and 426 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:16:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:50,503 INFO L93 Difference]: Finished difference Result 652 states and 817 transitions. [2021-11-19 14:16:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2021-11-19 14:16:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:50,508 INFO L225 Difference]: With dead ends: 652 [2021-11-19 14:16:50,508 INFO L226 Difference]: Without dead ends: 355 [2021-11-19 14:16:50,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:50,510 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 8 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:50,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1056 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:50,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-19 14:16:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2021-11-19 14:16:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 327 states have (on average 1.2507645259938838) internal successors, (409), 335 states have internal predecessors, (409), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 14:16:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 440 transitions. [2021-11-19 14:16:50,531 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 440 transitions. Word has length 67 [2021-11-19 14:16:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 440 transitions. [2021-11-19 14:16:50,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:16:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 440 transitions. [2021-11-19 14:16:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 14:16:50,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:50,535 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:50,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 419792281, now seen corresponding path program 1 times [2021-11-19 14:16:50,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:50,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186041690] [2021-11-19 14:16:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:50,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:50,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:50,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:16:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:51,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:51,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:51,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186041690] [2021-11-19 14:16:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186041690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:51,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798167954] [2021-11-19 14:16:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:51,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:51,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:51,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:16:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:16:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:52,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:52,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798167954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:52,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293723337] [2021-11-19 14:16:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:52,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:53,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:16:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:16:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:53,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 14:16:53,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293723337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:53,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:16:53,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 8, 7] total 21 [2021-11-19 14:16:53,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686595274] [2021-11-19 14:16:53,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:53,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:53,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:16:53,555 INFO L87 Difference]: Start difference. First operand 355 states and 440 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 14:16:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:54,316 INFO L93 Difference]: Finished difference Result 1943 states and 2472 transitions. [2021-11-19 14:16:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-19 14:16:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:54,335 INFO L225 Difference]: With dead ends: 1943 [2021-11-19 14:16:54,335 INFO L226 Difference]: Without dead ends: 1635 [2021-11-19 14:16:54,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:16:54,338 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1270 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 2269 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:16:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-11-19 14:16:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1235. [2021-11-19 14:16:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1161 states have (on average 1.26442721791559) internal successors, (1468), 1174 states have internal predecessors, (1468), 43 states have call successors, (43), 23 states have call predecessors, (43), 27 states have return successors, (48), 37 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-19 14:16:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1559 transitions. [2021-11-19 14:16:54,421 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1559 transitions. Word has length 69 [2021-11-19 14:16:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:54,422 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1559 transitions. [2021-11-19 14:16:54,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 14:16:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1559 transitions. [2021-11-19 14:16:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:16:54,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:54,431 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 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, 1, 1] [2021-11-19 14:16:54,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:54,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-19 14:16:54,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:55,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,035 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:16:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash -948266266, now seen corresponding path program 1 times [2021-11-19 14:16:55,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:55,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337537912] [2021-11-19 14:16:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:55,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:55,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:55,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:55,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:16:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:55,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:55,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:56,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:56,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337537912] [2021-11-19 14:16:56,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337537912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:56,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [375814838] [2021-11-19 14:16:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:56,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:56,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:16:56,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:16:56,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:16:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 14:16:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:16:57,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [375814838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:16:57,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624450441] [2021-11-19 14:16:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:57,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:57,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:16:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:57,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:16:57,764 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 14:16:57,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 14:16:57,873 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 14:16:57,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 14:16:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:16:57,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:16:58,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624450441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:58,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:16:58,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-19 14:16:58,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812378557] [2021-11-19 14:16:58,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:58,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:16:58,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:16:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:58,193 INFO L87 Difference]: Start difference. First operand 1235 states and 1559 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:17:02,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:07,924 INFO L93 Difference]: Finished difference Result 1720 states and 2218 transitions. [2021-11-19 14:17:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:17:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2021-11-19 14:17:07,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:07,942 INFO L225 Difference]: With dead ends: 1720 [2021-11-19 14:17:07,942 INFO L226 Difference]: Without dead ends: 1696 [2021-11-19 14:17:07,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:17:07,946 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 209 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:07,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-19 14:17:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-19 14:17:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1527. [2021-11-19 14:17:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1446 states have (on average 1.281466113416321) internal successors, (1853), 1461 states have internal predecessors, (1853), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 14:17:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1958 transitions. [2021-11-19 14:17:08,057 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1958 transitions. Word has length 101 [2021-11-19 14:17:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1958 transitions. [2021-11-19 14:17:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:17:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1958 transitions. [2021-11-19 14:17:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:17:08,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:08,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:08,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:08,682 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:17:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:08,682 INFO L85 PathProgramCache]: Analyzing trace with hash 281549929, now seen corresponding path program 1 times [2021-11-19 14:17:08,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:08,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916805963] [2021-11-19 14:17:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:08,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:08,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:08,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:17:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:09,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:17:09,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:09,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916805963] [2021-11-19 14:17:09,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916805963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:09,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561250106] [2021-11-19 14:17:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:09,834 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:09,835 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:09,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:17:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:17:10,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:17:10,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [561250106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:10,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:10,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 14:17:10,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667132197] [2021-11-19 14:17:10,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:10,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:10,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:10,623 INFO L87 Difference]: Start difference. First operand 1527 states and 1958 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:17:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:10,704 INFO L93 Difference]: Finished difference Result 3012 states and 3874 transitions. [2021-11-19 14:17:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2021-11-19 14:17:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:10,715 INFO L225 Difference]: With dead ends: 3012 [2021-11-19 14:17:10,715 INFO L226 Difference]: Without dead ends: 1532 [2021-11-19 14:17:10,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:10,719 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:10,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-19 14:17:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1532. [2021-11-19 14:17:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1451 states have (on average 1.2804962095106822) internal successors, (1858), 1466 states have internal predecessors, (1858), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 14:17:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1963 transitions. [2021-11-19 14:17:10,825 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1963 transitions. Word has length 113 [2021-11-19 14:17:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:10,826 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1963 transitions. [2021-11-19 14:17:10,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:17:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1963 transitions. [2021-11-19 14:17:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:17:10,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:10,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:10,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:11,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:11,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:11,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:17:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1641678105, now seen corresponding path program 1 times [2021-11-19 14:17:11,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:11,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312165934] [2021-11-19 14:17:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:11,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:11,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:11,246 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:11,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:17:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:11,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:17:12,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:12,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312165934] [2021-11-19 14:17:12,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312165934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:12,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050819184] [2021-11-19 14:17:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:12,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:12,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:12,298 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:12,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:17:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:17:13,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:17:13,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050819184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:13,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696154361] [2021-11-19 14:17:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:13,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:13,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:13,395 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:13,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:17:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:17:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:17:13,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:17:14,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696154361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:14,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:17:14,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-19 14:17:14,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119050991] [2021-11-19 14:17:14,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:17:14,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:17:14,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:17:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:17:14,190 INFO L87 Difference]: Start difference. First operand 1532 states and 1963 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:17:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:15,092 INFO L93 Difference]: Finished difference Result 3109 states and 4010 transitions. [2021-11-19 14:17:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:17:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2021-11-19 14:17:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:15,104 INFO L225 Difference]: With dead ends: 3109 [2021-11-19 14:17:15,104 INFO L226 Difference]: Without dead ends: 1600 [2021-11-19 14:17:15,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:17:15,108 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 95 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:15,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1851 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:17:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-11-19 14:17:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1564. [2021-11-19 14:17:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1483 states have (on average 1.2852326365475388) internal successors, (1906), 1498 states have internal predecessors, (1906), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 14:17:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2011 transitions. [2021-11-19 14:17:15,201 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2011 transitions. Word has length 113 [2021-11-19 14:17:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2011 transitions. [2021-11-19 14:17:15,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:17:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2011 transitions. [2021-11-19 14:17:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:17:15,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:15,205 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:15,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:15,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-19 14:17:15,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:15,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:15,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:17:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1776847847, now seen corresponding path program 2 times [2021-11-19 14:17:15,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:15,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136503635] [2021-11-19 14:17:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:17:15,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:15,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:15,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:17:16,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:17:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:17:16,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:17:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:17:17,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:17:18,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:18,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136503635] [2021-11-19 14:17:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136503635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:17:18,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [601751984] [2021-11-19 14:17:18,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:17:18,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:17:18,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:17:18,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:17:18,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:18:52,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:18:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:18:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:18:52,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:18:52,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:18:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [601751984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:52,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889269066] [2021-11-19 14:18:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:18:52,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:52,707 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:52,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:24:17,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:24:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:24:17,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:24:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:24:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 14:24:18,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889269066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:24:18,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:24:18,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 27 [2021-11-19 14:24:18,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459648794] [2021-11-19 14:24:18,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:24:18,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 14:24:18,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:24:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 14:24:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:24:18,399 INFO L87 Difference]: Start difference. First operand 1564 states and 2011 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:24:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:22,239 INFO L93 Difference]: Finished difference Result 3253 states and 4218 transitions. [2021-11-19 14:24:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 14:24:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2021-11-19 14:24:22,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:22,251 INFO L225 Difference]: With dead ends: 3253 [2021-11-19 14:24:22,251 INFO L226 Difference]: Without dead ends: 1700 [2021-11-19 14:24:22,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1077, Invalid=2829, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 14:24:22,259 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 322 mSDsluCounter, 3751 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:22,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 4027 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:24:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-11-19 14:24:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1628. [2021-11-19 14:24:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1547 states have (on average 1.2915319974143504) internal successors, (1998), 1562 states have internal predecessors, (1998), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 14:24:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2103 transitions. [2021-11-19 14:24:22,397 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2103 transitions. Word has length 121 [2021-11-19 14:24:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:22,398 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2103 transitions. [2021-11-19 14:24:22,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:24:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2103 transitions. [2021-11-19 14:24:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:24:22,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:22,401 INFO L514 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:24:22,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:22,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:24:22,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:23,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:24:23,026 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:24:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -189338137, now seen corresponding path program 3 times [2021-11-19 14:24:23,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:23,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105821797] [2021-11-19 14:24:23,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:24:23,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:23,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:23,030 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:23,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:24:40,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 14:24:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:24:40,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:24:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 14:24:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 213 proven. 108 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-19 14:24:43,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:24:43,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105821797] [2021-11-19 14:24:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105821797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:24:43,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1377252108] [2021-11-19 14:24:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:24:43,299 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:24:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:24:43,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:24:43,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c8175c7-9d31-4761-9e25-5bde8af76433/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process