./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:34,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:34,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:34,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:34,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:34,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:34,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:34,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:34,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:34,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:34,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:34,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:34,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:34,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:34,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:34,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:34,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:34,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:34,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:34,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:34,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:34,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:34,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:34,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:34,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:34,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:34,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:34,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:34,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:34,847 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:34,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:34,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:34,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:34,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:34,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:34,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:34,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:34,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:34,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:34,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:34,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:34,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:34,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:34,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:34,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:34,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:34,899 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:34,899 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:34,899 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:34,899 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:34,900 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:34,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:34,901 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:34,901 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:34,901 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:34,902 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:34,902 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:34,902 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:34,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:34,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:34,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:34,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:34,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:34,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:34,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:34,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:34,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:34,905 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:34,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:34,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:34,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:34,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:34,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:34,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:34,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:34,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:34,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:34,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:34,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:34,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:34,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:34,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:34,909 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-19 14:16:35,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:35,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:35,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:35,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:35,290 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:35,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-19 14:16:35,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/d8bc06675/b86792ef32464afcb3d09cc3a2d66267/FLAG0374775c5 [2021-11-19 14:16:36,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:36,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-19 14:16:36,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/d8bc06675/b86792ef32464afcb3d09cc3a2d66267/FLAG0374775c5 [2021-11-19 14:16:36,293 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/d8bc06675/b86792ef32464afcb3d09cc3a2d66267 [2021-11-19 14:16:36,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:36,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:36,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:36,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:36,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:36,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:36" (1/1) ... [2021-11-19 14:16:36,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e81237d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:36, skipping insertion in model container [2021-11-19 14:16:36,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:36" (1/1) ... [2021-11-19 14:16:36,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:36,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:36,844 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-19 14:16:36,857 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:36,880 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 14:16:36,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1710e6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:36, skipping insertion in model container [2021-11-19 14:16:36,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:36,882 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:36,884 INFO L158 Benchmark]: Toolchain (without parser) took 585.87ms. Allocated memory is still 127.9MB. Free memory was 92.7MB in the beginning and 92.3MB in the end (delta: 366.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:16:36,885 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 88.1MB. Free memory was 44.7MB in the beginning and 44.7MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:36,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 582.49ms. Allocated memory is still 127.9MB. Free memory was 92.6MB in the beginning and 92.3MB in the end (delta: 235.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:16:36,889 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 88.1MB. Free memory was 44.7MB in the beginning and 44.7MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 582.49ms. Allocated memory is still 127.9MB. Free memory was 92.6MB in the beginning and 92.3MB in the end (delta: 235.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:39,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:39,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:39,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:39,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:39,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:39,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:39,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:39,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:39,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:39,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:39,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:39,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:39,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:39,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:39,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:39,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:39,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:39,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:39,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:39,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:39,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:39,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:39,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:39,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:39,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:39,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:39,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:39,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:39,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:39,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:39,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:39,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:39,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:39,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:39,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:39,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:39,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:39,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:39,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:39,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:39,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:39,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:39,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:39,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:39,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:39,308 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:39,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:39,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:39,309 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:39,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:39,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:39,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:39,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:39,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:39,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:39,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:39,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:39,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:39,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:39,313 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:39,313 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:39,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:39,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:39,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:39,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:39,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:39,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:39,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:39,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:39,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:39,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:39,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:39,316 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:39,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:39,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:39,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:39,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:39,317 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-19 14:16:39,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:39,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:39,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:39,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:39,757 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:39,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-19 14:16:39,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/9d4f8cc02/7129333edf7b4eb2bfb2a3e772c1db41/FLAG1339e1475 [2021-11-19 14:16:40,554 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:40,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-19 14:16:40,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/9d4f8cc02/7129333edf7b4eb2bfb2a3e772c1db41/FLAG1339e1475 [2021-11-19 14:16:40,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/data/9d4f8cc02/7129333edf7b4eb2bfb2a3e772c1db41 [2021-11-19 14:16:40,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:40,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:40,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:40,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:40,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:40,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:40" (1/1) ... [2021-11-19 14:16:40,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f9e79c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:40, skipping insertion in model container [2021-11-19 14:16:40,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:40" (1/1) ... [2021-11-19 14:16:40,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:40,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:41,332 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-19 14:16:41,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:41,362 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:41,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:41,553 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-19 14:16:41,561 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:41,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:41,713 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_e96ebfb8-2e9c-487e-b263-1cbc831da53d/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-19 14:16:41,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:41,739 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:41,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41 WrapperNode [2021-11-19 14:16:41,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:41,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:41,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:41,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:41,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,849 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 751 [2021-11-19 14:16:41,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:41,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:41,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:41,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:41,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:41,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:41,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:41,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:41,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (1/1) ... [2021-11-19 14:16:41,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:41,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:41,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:42,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:42,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:42,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:16:42,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:16:42,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:16:42,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:16:42,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:16:42,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:42,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:42,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:16:42,212 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:42,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:42,233 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:16:51,798 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:16:51,798 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:16:51,798 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:51,806 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:51,806 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:16:51,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:51 BoogieIcfgContainer [2021-11-19 14:16:51,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:51,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:51,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:51,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:51,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:40" (1/3) ... [2021-11-19 14:16:51,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfd83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:51, skipping insertion in model container [2021-11-19 14:16:51,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:41" (2/3) ... [2021-11-19 14:16:51,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfd83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:51, skipping insertion in model container [2021-11-19 14:16:51,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:51" (3/3) ... [2021-11-19 14:16:51,816 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-19 14:16:51,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:51,822 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:51,872 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:51,879 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 14:16:51,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 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 14:16:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:16:51,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:51,908 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 14:16:51,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-19 14:16:51,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:51,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502006009] [2021-11-19 14:16:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:51,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:51,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:51,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:52,580 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 14:16:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:52,896 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 14:16:52,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:52,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502006009] [2021-11-19 14:16:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502006009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:52,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:52,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:16:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127464167] [2021-11-19 14:16:52,907 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:52,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:52,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:52,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:52,954 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:53,147 INFO L93 Difference]: Finished difference Result 542 states and 920 transitions. [2021-11-19 14:16:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 14:16:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:53,175 INFO L225 Difference]: With dead ends: 542 [2021-11-19 14:16:53,176 INFO L226 Difference]: Without dead ends: 368 [2021-11-19 14:16:53,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:53,187 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:53,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 667 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-19 14:16:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-19 14:16:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5231607629427792) internal successors, (559), 367 states have internal predecessors, (559), 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 14:16:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 559 transitions. [2021-11-19 14:16:53,294 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 559 transitions. Word has length 47 [2021-11-19 14:16:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 559 transitions. [2021-11-19 14:16:53,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 559 transitions. [2021-11-19 14:16:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:16:53,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:53,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:16:53,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:16:53,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:53,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -483730754, now seen corresponding path program 1 times [2021-11-19 14:16:53,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:53,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170071302] [2021-11-19 14:16:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:53,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:53,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:53,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:54,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:54,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170071302] [2021-11-19 14:16:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170071302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:54,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:54,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:16:54,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824713245] [2021-11-19 14:16:54,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:16:54,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:16:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:54,408 INFO L87 Difference]: Start difference. First operand 368 states and 559 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:54,591 INFO L93 Difference]: Finished difference Result 723 states and 1103 transitions. [2021-11-19 14:16:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:16:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-19 14:16:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:54,595 INFO L225 Difference]: With dead ends: 723 [2021-11-19 14:16:54,595 INFO L226 Difference]: Without dead ends: 484 [2021-11-19 14:16:54,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:16:54,598 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:54,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 557 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-19 14:16:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-19 14:16:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 483 states have internal predecessors, (734), 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 14:16:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 734 transitions. [2021-11-19 14:16:54,659 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 734 transitions. Word has length 87 [2021-11-19 14:16:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 734 transitions. [2021-11-19 14:16:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 734 transitions. [2021-11-19 14:16:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:16:54,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:54,664 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:16:54,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:54,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 595564554, now seen corresponding path program 1 times [2021-11-19 14:16:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515255036] [2021-11-19 14:16:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:54,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:54,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:55,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:55,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:55,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515255036] [2021-11-19 14:16:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515255036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:55,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:55,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:16:55,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836746912] [2021-11-19 14:16:55,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:55,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:55,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:55,831 INFO L87 Difference]: Start difference. First operand 484 states and 734 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:55,987 INFO L93 Difference]: Finished difference Result 1074 states and 1637 transitions. [2021-11-19 14:16:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-19 14:16:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:55,993 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 14:16:55,993 INFO L226 Difference]: Without dead ends: 719 [2021-11-19 14:16:55,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:55,995 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 324 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:55,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 724 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:16:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-19 14:16:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-19 14:16:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5181058495821727) internal successors, (1090), 718 states have internal predecessors, (1090), 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 14:16:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1090 transitions. [2021-11-19 14:16:56,023 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1090 transitions. Word has length 109 [2021-11-19 14:16:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1090 transitions. [2021-11-19 14:16:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:16:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1090 transitions. [2021-11-19 14:16:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:16:56,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:56,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 14:16:56,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:56,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -65336556, now seen corresponding path program 1 times [2021-11-19 14:16:56,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:56,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830218959] [2021-11-19 14:16:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:56,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:56,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:56,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:16:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:56,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:16:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 14:16:56,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:56,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-19 14:16:56,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-19 14:16:57,403 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:16:57,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 797 treesize of output 769 [2021-11-19 14:16:57,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:57,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-19 14:16:57,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-19 14:16:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-19 14:16:57,717 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:16:57,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:16:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:16:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-19 14:16:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-19 14:16:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-19 14:16:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-19 14:16:58,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:58,663 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,665 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:16:58,673 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,676 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:16:58,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,821 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-19 14:16:58,827 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,831 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-19 14:16:58,840 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,843 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-19 14:16:58,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:16:58,856 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-19 14:16:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-19 14:16:59,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:59,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830218959] [2021-11-19 14:16:59,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830218959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:59,156 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:59,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:16:59,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320206792] [2021-11-19 14:16:59,159 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:59,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:59,160 INFO L87 Difference]: Start difference. First operand 719 states and 1090 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:17:01,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:03,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:08,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:11,031 INFO L93 Difference]: Finished difference Result 1435 states and 2176 transitions. [2021-11-19 14:17:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:17:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-19 14:17:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:11,051 INFO L225 Difference]: With dead ends: 1435 [2021-11-19 14:17:11,051 INFO L226 Difference]: Without dead ends: 719 [2021-11-19 14:17:11,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:17:11,053 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 12 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:11,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 967 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 2 Unknown, 58 Unchecked, 11.7s Time] [2021-11-19 14:17:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-19 14:17:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-19 14:17:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5167130919220055) internal successors, (1089), 718 states have internal predecessors, (1089), 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 14:17:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1089 transitions. [2021-11-19 14:17:11,101 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1089 transitions. Word has length 150 [2021-11-19 14:17:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:11,101 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1089 transitions. [2021-11-19 14:17:11,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:17:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1089 transitions. [2021-11-19 14:17:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:17:11,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:11,105 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 14:17:11,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:11,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:11,322 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -329984046, now seen corresponding path program 1 times [2021-11-19 14:17:11,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:11,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027170032] [2021-11-19 14:17:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:11,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:11,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:17:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:11,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:12,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:12,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:12,501 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:17:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:17:13,868 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:17:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:17:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:14,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:17:14,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:14,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027170032] [2021-11-19 14:17:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027170032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:14,489 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:17:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889532364] [2021-11-19 14:17:14,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:14,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:14,491 INFO L87 Difference]: Start difference. First operand 719 states and 1089 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:17:16,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:19,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:21,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:27,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:32,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:34,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:36,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:42,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:51,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:52,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:54,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:17:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:57,826 INFO L93 Difference]: Finished difference Result 2592 states and 3954 transitions. [2021-11-19 14:17:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:17:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-19 14:17:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:57,841 INFO L225 Difference]: With dead ends: 2592 [2021-11-19 14:17:57,841 INFO L226 Difference]: Without dead ends: 1883 [2021-11-19 14:17:57,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:57,844 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 237 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:57,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 795 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 729 Invalid, 1 Unknown, 0 Unchecked, 43.1s Time] [2021-11-19 14:17:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-19 14:17:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 851. [2021-11-19 14:17:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5494117647058823) internal successors, (1317), 850 states have internal predecessors, (1317), 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 14:17:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1317 transitions. [2021-11-19 14:17:57,923 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1317 transitions. Word has length 150 [2021-11-19 14:17:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1317 transitions. [2021-11-19 14:17:57,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:17:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1317 transitions. [2021-11-19 14:17:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:17:57,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:57,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:57,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:17:58,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:58,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1210495758, now seen corresponding path program 1 times [2021-11-19 14:17:58,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:58,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623098430] [2021-11-19 14:17:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:58,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:58,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:58,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:58,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:17:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:58,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:58,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:58,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:17:58,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:58,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:58,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:58,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:58,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:17:59,252 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:17:59,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:18:00,447 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:18:00,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:18:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:18:00,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:18:01,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:01,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623098430] [2021-11-19 14:18:01,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623098430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:01,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:01,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:18:01,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414994595] [2021-11-19 14:18:01,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:01,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:18:01,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:18:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:18:01,007 INFO L87 Difference]: Start difference. First operand 851 states and 1317 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:03,030 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 14:18:05,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:24,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:26,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:32,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:35,730 INFO L93 Difference]: Finished difference Result 2807 states and 4330 transitions. [2021-11-19 14:18:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:18:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-19 14:18:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:35,747 INFO L225 Difference]: With dead ends: 2807 [2021-11-19 14:18:35,747 INFO L226 Difference]: Without dead ends: 1966 [2021-11-19 14:18:35,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:18:35,752 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 228 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:35,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 589 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 543 Invalid, 2 Unknown, 0 Unchecked, 34.5s Time] [2021-11-19 14:18:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-11-19 14:18:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 967. [2021-11-19 14:18:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.5714285714285714) internal successors, (1518), 966 states have internal predecessors, (1518), 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 14:18:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1518 transitions. [2021-11-19 14:18:35,835 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1518 transitions. Word has length 151 [2021-11-19 14:18:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:35,836 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1518 transitions. [2021-11-19 14:18:35,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1518 transitions. [2021-11-19 14:18:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:18:35,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:35,840 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 14:18:35,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:36,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:36,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1783349868, now seen corresponding path program 1 times [2021-11-19 14:18:36,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:36,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512640236] [2021-11-19 14:18:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:36,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:36,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:36,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:36,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:18:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:18:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:18:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:18:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:18:36,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:18:36,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:18:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:18:37,088 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:18:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:18:37,890 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:18:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:18:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:18:38,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:18:38,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:38,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512640236] [2021-11-19 14:18:38,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512640236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:38,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:18:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956712890] [2021-11-19 14:18:38,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:38,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:18:38,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:18:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:18:38,510 INFO L87 Difference]: Start difference. First operand 967 states and 1518 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:18:40,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:46,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:18:59,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:00,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:01,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:09,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:19:12,311 INFO L93 Difference]: Finished difference Result 2921 states and 4538 transitions. [2021-11-19 14:19:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:19:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-19 14:19:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:19:12,326 INFO L225 Difference]: With dead ends: 2921 [2021-11-19 14:19:12,326 INFO L226 Difference]: Without dead ends: 2104 [2021-11-19 14:19:12,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:19:12,328 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 226 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:19:12,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 833 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 1 Unknown, 0 Unchecked, 33.6s Time] [2021-11-19 14:19:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-19 14:19:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1081. [2021-11-19 14:19:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.5787037037037037) internal successors, (1705), 1080 states have internal predecessors, (1705), 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 14:19:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1705 transitions. [2021-11-19 14:19:12,396 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1705 transitions. Word has length 167 [2021-11-19 14:19:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:19:12,396 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1705 transitions. [2021-11-19 14:19:12,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:19:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1705 transitions. [2021-11-19 14:19:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:19:12,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:19:12,401 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 14:19:12,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:19:12,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:19:12,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:19:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:19:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 113892171, now seen corresponding path program 1 times [2021-11-19 14:19:12,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:19:12,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706263894] [2021-11-19 14:19:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:19:12,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:19:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:19:12,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:19:12,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:19:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:19:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:19:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:19:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:13,661 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:19:13,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:19:14,563 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:19:14,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:19:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:19:14,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:19:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:19:15,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:19:15,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706263894] [2021-11-19 14:19:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706263894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:19:15,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:19:15,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:19:15,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954848669] [2021-11-19 14:19:15,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:19:15,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:19:15,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:19:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:19:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:19:15,179 INFO L87 Difference]: Start difference. First operand 1081 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:19:17,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:19,222 WARN L515 Checker$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 14:19:21,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:29,417 WARN L515 Checker$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 14:19:32,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:33,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:35,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:39,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:42,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:19:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:19:48,320 INFO L93 Difference]: Finished difference Result 3141 states and 4889 transitions. [2021-11-19 14:19:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:19:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-19 14:19:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:19:48,335 INFO L225 Difference]: With dead ends: 3141 [2021-11-19 14:19:48,335 INFO L226 Difference]: Without dead ends: 2229 [2021-11-19 14:19:48,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:19:48,338 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 231 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:19:48,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 585 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 539 Invalid, 3 Unknown, 0 Unchecked, 32.9s Time] [2021-11-19 14:19:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-11-19 14:19:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1212. [2021-11-19 14:19:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.583815028901734) internal successors, (1918), 1211 states have internal predecessors, (1918), 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 14:19:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1918 transitions. [2021-11-19 14:19:48,421 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1918 transitions. Word has length 168 [2021-11-19 14:19:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:19:48,422 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1918 transitions. [2021-11-19 14:19:48,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:19:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1918 transitions. [2021-11-19 14:19:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:19:48,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:19:48,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 14:19:48,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:19:48,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:19:48,644 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:19:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:19:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 137677863, now seen corresponding path program 1 times [2021-11-19 14:19:48,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:19:48,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795225261] [2021-11-19 14:19:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:19:48,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:19:48,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:19:48,647 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:19:48,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:19:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:19:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:19:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:19:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:19:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:19:49,744 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:19:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:19:50,720 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:19:50,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:19:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:19:50,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:19:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:19:51,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:19:51,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795225261] [2021-11-19 14:19:51,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [795225261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:19:51,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:19:51,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:19:51,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127629321] [2021-11-19 14:19:51,268 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:19:51,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:19:51,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:19:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:19:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:19:51,269 INFO L87 Difference]: Start difference. First operand 1212 states and 1918 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:19:53,287 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 14:19:55,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:01,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:02,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:06,203 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:12,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:14,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:20,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:22,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:24,238 INFO L93 Difference]: Finished difference Result 3347 states and 5214 transitions. [2021-11-19 14:20:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:20:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-19 14:20:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:24,251 INFO L225 Difference]: With dead ends: 3347 [2021-11-19 14:20:24,251 INFO L226 Difference]: Without dead ends: 2335 [2021-11-19 14:20:24,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:20:24,254 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 226 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 561 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 32.8s Time] [2021-11-19 14:20:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-11-19 14:20:24,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1338. [2021-11-19 14:20:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 1.5833956619296934) internal successors, (2117), 1337 states have internal predecessors, (2117), 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 14:20:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2117 transitions. [2021-11-19 14:20:24,336 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2117 transitions. Word has length 169 [2021-11-19 14:20:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:24,336 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 2117 transitions. [2021-11-19 14:20:24,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:20:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2117 transitions. [2021-11-19 14:20:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:20:24,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:24,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:20:24,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:24,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:24,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2080444553, now seen corresponding path program 1 times [2021-11-19 14:20:24,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:24,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267956277] [2021-11-19 14:20:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:24,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:24,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:24,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:20:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:20:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:25,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:25,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:25,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:25,698 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:20:25,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:20:27,263 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:20:27,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:20:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:20:27,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:20:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:20:27,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:20:27,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267956277] [2021-11-19 14:20:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267956277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:20:27,914 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:20:27,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:20:27,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618632263] [2021-11-19 14:20:27,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:20:27,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:20:27,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:20:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:20:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:20:27,915 INFO L87 Difference]: Start difference. First operand 1338 states and 2117 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:20:29,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:31,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:33,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:39,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:42,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:46,797 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:48,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:55,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:20:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:20:58,253 INFO L93 Difference]: Finished difference Result 3679 states and 5736 transitions. [2021-11-19 14:20:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:20:58,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 179 [2021-11-19 14:20:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:20:58,266 INFO L225 Difference]: With dead ends: 3679 [2021-11-19 14:20:58,266 INFO L226 Difference]: Without dead ends: 2362 [2021-11-19 14:20:58,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:20:58,268 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 184 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:20:58,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 555 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 487 Invalid, 1 Unknown, 0 Unchecked, 30.1s Time] [2021-11-19 14:20:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-11-19 14:20:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1536. [2021-11-19 14:20:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.5941368078175895) internal successors, (2447), 1535 states have internal predecessors, (2447), 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 14:20:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2447 transitions. [2021-11-19 14:20:58,373 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2447 transitions. Word has length 179 [2021-11-19 14:20:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:20:58,373 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2447 transitions. [2021-11-19 14:20:58,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:20:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2447 transitions. [2021-11-19 14:20:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 14:20:58,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:20:58,378 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:20:58,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:20:58,596 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:20:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:20:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1105638902, now seen corresponding path program 1 times [2021-11-19 14:20:58,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:20:58,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085329095] [2021-11-19 14:20:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:20:58,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:20:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:20:58,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:20:58,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:20:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:20:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:20:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:20:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:20:59,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:20:59,794 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:20:59,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:21:00,195 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:21:00,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:21:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:21:00,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:21:00,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:00,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085329095] [2021-11-19 14:21:00,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085329095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:00,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:00,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:21:00,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811938729] [2021-11-19 14:21:00,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:21:00,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:21:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:21:00,800 INFO L87 Difference]: Start difference. First operand 1536 states and 2447 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 14:21:02,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:04,828 WARN L515 Checker$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 14:21:06,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:08,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:13,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:25,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:33,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:35,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:21:37,938 INFO L93 Difference]: Finished difference Result 4025 states and 6308 transitions. [2021-11-19 14:21:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:21:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 182 [2021-11-19 14:21:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:21:37,952 INFO L225 Difference]: With dead ends: 4025 [2021-11-19 14:21:37,953 INFO L226 Difference]: Without dead ends: 2510 [2021-11-19 14:21:37,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:21:37,955 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 246 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:21:37,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 584 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 526 Invalid, 3 Unknown, 0 Unchecked, 36.9s Time] [2021-11-19 14:21:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-11-19 14:21:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1536. [2021-11-19 14:21:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.570684039087948) internal successors, (2411), 1535 states have internal predecessors, (2411), 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 14:21:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2411 transitions. [2021-11-19 14:21:38,059 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2411 transitions. Word has length 182 [2021-11-19 14:21:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:21:38,060 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2411 transitions. [2021-11-19 14:21:38,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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 14:21:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2411 transitions. [2021-11-19 14:21:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-19 14:21:38,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:21:38,064 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:38,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:21:38,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:21:38,278 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:21:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:21:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash 612161782, now seen corresponding path program 1 times [2021-11-19 14:21:38,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:21:38,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056324507] [2021-11-19 14:21:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:21:38,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:21:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:21:38,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:21:38,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:21:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:21:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:21:38,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:21:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:21:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:21:39,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:21:39,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:21:39,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:21:39,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:21:39,349 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:21:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:21:39,774 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:21:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:21:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:21:39,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:21:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:21:40,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:21:40,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056324507] [2021-11-19 14:21:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056324507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:21:40,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:21:40,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:21:40,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515913526] [2021-11-19 14:21:40,365 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:21:40,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:21:40,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:21:40,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:21:40,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:21:40,366 INFO L87 Difference]: Start difference. First operand 1536 states and 2411 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 14:21:42,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:21:44,396 WARN L515 Checker$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 14:21:53,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:00,972 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:08,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:12,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:16,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:17,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:19,551 INFO L93 Difference]: Finished difference Result 4128 states and 6388 transitions. [2021-11-19 14:22:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 182 [2021-11-19 14:22:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:19,563 INFO L225 Difference]: With dead ends: 4128 [2021-11-19 14:22:19,563 INFO L226 Difference]: Without dead ends: 2613 [2021-11-19 14:22:19,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:22:19,566 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 242 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:19,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 774 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 695 Invalid, 2 Unknown, 0 Unchecked, 39.0s Time] [2021-11-19 14:22:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-19 14:22:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1596. [2021-11-19 14:22:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 1.5454545454545454) internal successors, (2465), 1595 states have internal predecessors, (2465), 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 14:22:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2465 transitions. [2021-11-19 14:22:19,679 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2465 transitions. Word has length 182 [2021-11-19 14:22:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2465 transitions. [2021-11-19 14:22:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 14:22:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2465 transitions. [2021-11-19 14:22:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:22:19,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:19,684 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:19,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:19,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:19,898 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash 610130770, now seen corresponding path program 1 times [2021-11-19 14:22:19,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:19,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974429392] [2021-11-19 14:22:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:19,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:19,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:19,900 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:19,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:22:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:22:20,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:20,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:20,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:20,974 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:22:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:22:21,470 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:22:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:22:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:22:21,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:22:22,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:22,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974429392] [2021-11-19 14:22:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974429392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:22,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:22,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:22:22,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636445989] [2021-11-19 14:22:22,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:22,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:22:22,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:22:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:22:22,103 INFO L87 Difference]: Start difference. First operand 1596 states and 2465 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:24,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:26,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:28,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:29,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:40,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:48,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:22:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:22:54,595 INFO L93 Difference]: Finished difference Result 4188 states and 6402 transitions. [2021-11-19 14:22:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:22:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-19 14:22:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:22:54,606 INFO L225 Difference]: With dead ends: 4188 [2021-11-19 14:22:54,606 INFO L226 Difference]: Without dead ends: 2613 [2021-11-19 14:22:54,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:22:54,609 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 238 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:22:54,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 584 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 529 Invalid, 2 Unknown, 0 Unchecked, 32.3s Time] [2021-11-19 14:22:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-19 14:22:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1601. [2021-11-19 14:22:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 1.524375) internal successors, (2439), 1600 states have internal predecessors, (2439), 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 14:22:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2439 transitions. [2021-11-19 14:22:54,727 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2439 transitions. Word has length 183 [2021-11-19 14:22:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:22:54,727 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2439 transitions. [2021-11-19 14:22:54,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:22:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2439 transitions. [2021-11-19 14:22:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:22:54,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:22:54,732 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:54,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:22:54,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:22:54,946 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:22:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:22:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 944860177, now seen corresponding path program 1 times [2021-11-19 14:22:54,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:22:54,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102044469] [2021-11-19 14:22:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:22:54,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:22:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:22:54,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:22:54,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:22:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:22:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:22:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:22:55,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:22:55,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:55,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:55,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:55,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:55,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:22:56,163 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:22:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:22:56,719 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:22:56,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:22:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:22:56,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:22:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:22:57,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:22:57,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102044469] [2021-11-19 14:22:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102044469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:22:57,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:22:57,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:22:57,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521247446] [2021-11-19 14:22:57,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:22:57,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:22:57,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:22:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:22:57,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:22:57,464 INFO L87 Difference]: Start difference. First operand 1601 states and 2439 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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 14:22:59,497 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:01,507 WARN L515 Checker$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 14:23:04,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:05,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:07,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:14,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:15,996 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:18,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:22,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:25,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:32,409 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:38,349 INFO L93 Difference]: Finished difference Result 4193 states and 6336 transitions. [2021-11-19 14:23:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:23:38,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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 184 [2021-11-19 14:23:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:38,364 INFO L225 Difference]: With dead ends: 4193 [2021-11-19 14:23:38,364 INFO L226 Difference]: Without dead ends: 2613 [2021-11-19 14:23:38,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:23:38,365 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 234 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:38,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 769 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 693 Invalid, 3 Unknown, 0 Unchecked, 40.6s Time] [2021-11-19 14:23:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-19 14:23:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1606. [2021-11-19 14:23:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.5034267912772585) internal successors, (2413), 1605 states have internal predecessors, (2413), 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 14:23:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2413 transitions. [2021-11-19 14:23:38,453 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2413 transitions. Word has length 184 [2021-11-19 14:23:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:38,453 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2413 transitions. [2021-11-19 14:23:38,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 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 14:23:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2413 transitions. [2021-11-19 14:23:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:23:38,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:38,463 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:38,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:38,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:23:38,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1165739315, now seen corresponding path program 1 times [2021-11-19 14:23:38,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:23:38,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437499906] [2021-11-19 14:23:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:38,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:23:38,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:23:38,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:23:38,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:23:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:23:39,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:23:39,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:23:39,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:23:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:23:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:23:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:23:39,868 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:23:39,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:23:40,642 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:23:40,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:23:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:23:40,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 14:23:41,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:23:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437499906] [2021-11-19 14:23:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437499906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:41,324 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:41,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:23:41,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977329543] [2021-11-19 14:23:41,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:41,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:23:41,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:23:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:23:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:23:41,325 INFO L87 Difference]: Start difference. First operand 1606 states and 2413 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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 14:23:43,347 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 14:23:46,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:49,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:51,601 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:53,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:56,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:23:57,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:01,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:03,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:10,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:13,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:13,675 INFO L93 Difference]: Finished difference Result 4105 states and 6146 transitions. [2021-11-19 14:24:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:24:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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 185 [2021-11-19 14:24:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:13,685 INFO L225 Difference]: With dead ends: 4105 [2021-11-19 14:24:13,685 INFO L226 Difference]: Without dead ends: 2520 [2021-11-19 14:24:13,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:24:13,689 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 226 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:13,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 608 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 518 Invalid, 1 Unknown, 0 Unchecked, 32.1s Time] [2021-11-19 14:24:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-11-19 14:24:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1606. [2021-11-19 14:24:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.4809968847352024) internal successors, (2377), 1605 states have internal predecessors, (2377), 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 14:24:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2377 transitions. [2021-11-19 14:24:13,782 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2377 transitions. Word has length 185 [2021-11-19 14:24:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:13,782 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2377 transitions. [2021-11-19 14:24:13,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 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 14:24:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2377 transitions. [2021-11-19 14:24:13,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 14:24:13,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:13,786 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:24:13,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:14,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:24:14,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:24:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1602969417, now seen corresponding path program 1 times [2021-11-19 14:24:14,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:14,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134549814] [2021-11-19 14:24:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:24:14,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:14,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:14,004 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:14,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:24:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:24:14,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:24:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:14,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:15,113 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:24:15,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:24:15,840 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:24:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:24:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:24:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:24:16,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:24:16,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134549814] [2021-11-19 14:24:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134549814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:24:16,481 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:24:16,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:24:16,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898657311] [2021-11-19 14:24:16,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:24:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:24:16,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:24:16,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:24:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:24:16,484 INFO L87 Difference]: Start difference. First operand 1606 states and 2377 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:24:18,502 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 14:24:24,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:28,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:30,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:24:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:24:44,257 INFO L93 Difference]: Finished difference Result 4282 states and 6340 transitions. [2021-11-19 14:24:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:24:44,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-19 14:24:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:24:44,264 INFO L225 Difference]: With dead ends: 4282 [2021-11-19 14:24:44,264 INFO L226 Difference]: Without dead ends: 2697 [2021-11-19 14:24:44,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:24:44,267 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 219 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:24:44,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 533 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 499 Invalid, 1 Unknown, 0 Unchecked, 27.5s Time] [2021-11-19 14:24:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-11-19 14:24:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 1702. [2021-11-19 14:24:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.4538506760728982) internal successors, (2473), 1701 states have internal predecessors, (2473), 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 14:24:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2473 transitions. [2021-11-19 14:24:44,392 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2473 transitions. Word has length 192 [2021-11-19 14:24:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:24:44,393 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2473 transitions. [2021-11-19 14:24:44,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:24:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2473 transitions. [2021-11-19 14:24:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 14:24:44,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:24:44,397 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:24:44,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:24:44,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:24:44,614 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:24:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:24:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 358080211, now seen corresponding path program 1 times [2021-11-19 14:24:44,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:24:44,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834762546] [2021-11-19 14:24:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:24:44,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:24:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:24:44,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:24:44,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:24:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:24:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:24:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:24:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:24:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:24:45,770 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:24:45,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:24:46,488 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:24:46,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:24:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:24:46,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:24:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:24:47,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:24:47,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834762546] [2021-11-19 14:24:47,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834762546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:24:47,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:24:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:24:47,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529392898] [2021-11-19 14:24:47,139 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:24:47,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:24:47,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:24:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:24:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:24:47,140 INFO L87 Difference]: Start difference. First operand 1702 states and 2473 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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 14:24:49,162 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 14:24:58,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:12,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:15,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:18,515 INFO L93 Difference]: Finished difference Result 4272 states and 6230 transitions. [2021-11-19 14:25:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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 193 [2021-11-19 14:25:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:18,520 INFO L225 Difference]: With dead ends: 4272 [2021-11-19 14:25:18,520 INFO L226 Difference]: Without dead ends: 2591 [2021-11-19 14:25:18,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:25:18,521 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 216 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:18,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 733 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 31.1s Time] [2021-11-19 14:25:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-11-19 14:25:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1702. [2021-11-19 14:25:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 1.432686654908877) internal successors, (2437), 1701 states have internal predecessors, (2437), 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 14:25:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2437 transitions. [2021-11-19 14:25:18,632 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2437 transitions. Word has length 193 [2021-11-19 14:25:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:18,633 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2437 transitions. [2021-11-19 14:25:18,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 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 14:25:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2437 transitions. [2021-11-19 14:25:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:25:18,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:18,635 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:25:18,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:25:18,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:18,836 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 23380864, now seen corresponding path program 1 times [2021-11-19 14:25:18,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:18,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034663881] [2021-11-19 14:25:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:18,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:18,838 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:18,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:25:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:19,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:25:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:19,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:20,109 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:25:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:25:21,613 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:25:21,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:25:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:25:21,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:25:22,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:22,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034663881] [2021-11-19 14:25:22,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034663881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:22,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:22,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:25:22,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32361703] [2021-11-19 14:25:22,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:25:22,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:25:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:25:22,307 INFO L87 Difference]: Start difference. First operand 1702 states and 2437 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:25:24,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:32,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:33,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:45,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:47,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:25:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:25:50,202 INFO L93 Difference]: Finished difference Result 4464 states and 6430 transitions. [2021-11-19 14:25:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:25:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 195 [2021-11-19 14:25:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:25:50,207 INFO L225 Difference]: With dead ends: 4464 [2021-11-19 14:25:50,207 INFO L226 Difference]: Without dead ends: 2783 [2021-11-19 14:25:50,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:25:50,209 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 188 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:25:50,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 532 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 494 Invalid, 2 Unknown, 0 Unchecked, 27.6s Time] [2021-11-19 14:25:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-11-19 14:25:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1924. [2021-11-19 14:25:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 1.4388975559022361) internal successors, (2767), 1923 states have internal predecessors, (2767), 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 14:25:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2767 transitions. [2021-11-19 14:25:50,374 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2767 transitions. Word has length 195 [2021-11-19 14:25:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:25:50,374 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 2767 transitions. [2021-11-19 14:25:50,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:25:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2767 transitions. [2021-11-19 14:25:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 14:25:50,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:25:50,389 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:25:50,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 14:25:50,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:25:50,606 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:25:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:25:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1795148868, now seen corresponding path program 1 times [2021-11-19 14:25:50,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:25:50,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892205035] [2021-11-19 14:25:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:25:50,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:25:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:25:50,609 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:25:50,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:25:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:25:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:25:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:25:51,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:25:51,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:51,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:51,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:51,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:51,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:25:51,730 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:25:51,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:25:53,243 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:25:53,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:25:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:25:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:25:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:25:53,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:25:53,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892205035] [2021-11-19 14:25:53,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892205035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:25:53,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:25:53,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:25:53,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713873433] [2021-11-19 14:25:53,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:25:53,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:25:53,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:25:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:25:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:25:53,995 INFO L87 Difference]: Start difference. First operand 1924 states and 2767 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 14:25:56,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:04,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:05,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:10,254 WARN L515 Checker$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 14:26:16,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:19,020 INFO L93 Difference]: Finished difference Result 4724 states and 6811 transitions. [2021-11-19 14:26:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:26:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 196 [2021-11-19 14:26:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:19,025 INFO L225 Difference]: With dead ends: 4724 [2021-11-19 14:26:19,025 INFO L226 Difference]: Without dead ends: 2821 [2021-11-19 14:26:19,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:19,027 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 184 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:19,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 524 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 488 Invalid, 2 Unknown, 0 Unchecked, 24.8s Time] [2021-11-19 14:26:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-11-19 14:26:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 1990. [2021-11-19 14:26:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.4394167923579688) internal successors, (2863), 1989 states have internal predecessors, (2863), 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 14:26:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2863 transitions. [2021-11-19 14:26:19,140 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2863 transitions. Word has length 196 [2021-11-19 14:26:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:19,140 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 2863 transitions. [2021-11-19 14:26:19,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 14:26:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2863 transitions. [2021-11-19 14:26:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-19 14:26:19,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:19,143 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:19,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:19,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:19,345 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -885263924, now seen corresponding path program 1 times [2021-11-19 14:26:19,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:19,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451540770] [2021-11-19 14:26:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:19,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:19,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:19,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:26:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:20,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:20,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:20,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:20,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:20,524 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:26:20,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:26:22,182 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:26:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:26:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:26:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:26:22,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:22,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451540770] [2021-11-19 14:26:22,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451540770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:22,888 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:22,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:26:22,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105964102] [2021-11-19 14:26:22,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:22,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:22,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:22,889 INFO L87 Difference]: Start difference. First operand 1990 states and 2863 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 14:26:24,907 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 14:26:38,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:26:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:49,477 INFO L93 Difference]: Finished difference Result 4982 states and 7160 transitions. [2021-11-19 14:26:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:26:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 200 [2021-11-19 14:26:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:49,484 INFO L225 Difference]: With dead ends: 4982 [2021-11-19 14:26:49,485 INFO L226 Difference]: Without dead ends: 3013 [2021-11-19 14:26:49,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:49,487 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 179 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:49,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 703 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 648 Invalid, 1 Unknown, 0 Unchecked, 26.3s Time] [2021-11-19 14:26:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-11-19 14:26:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2194. [2021-11-19 14:26:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 1.436844505243958) internal successors, (3151), 2193 states have internal predecessors, (3151), 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 14:26:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3151 transitions. [2021-11-19 14:26:49,673 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3151 transitions. Word has length 200 [2021-11-19 14:26:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 3151 transitions. [2021-11-19 14:26:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 14:26:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3151 transitions. [2021-11-19 14:26:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 14:26:49,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:49,678 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:26:49,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:49,899 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892435, now seen corresponding path program 1 times [2021-11-19 14:26:49,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:49,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91390511] [2021-11-19 14:26:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:49,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:49,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:26:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:50,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:50,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:26:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:50,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:50,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:26:50,998 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:26:50,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:26:52,651 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:26:52,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:26:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:26:52,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:26:53,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:53,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91390511] [2021-11-19 14:26:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91390511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:53,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:53,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:26:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890072745] [2021-11-19 14:26:53,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:53,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:53,375 INFO L87 Difference]: Start difference. First operand 2194 states and 3151 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 14:26:55,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:02,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:16,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:18,172 INFO L93 Difference]: Finished difference Result 5178 states and 7436 transitions. [2021-11-19 14:27:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 201 [2021-11-19 14:27:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:18,180 INFO L225 Difference]: With dead ends: 5178 [2021-11-19 14:27:18,181 INFO L226 Difference]: Without dead ends: 3005 [2021-11-19 14:27:18,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:18,183 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 173 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:18,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 516 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 485 Invalid, 1 Unknown, 0 Unchecked, 24.5s Time] [2021-11-19 14:27:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-11-19 14:27:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2212. [2021-11-19 14:27:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 1.438715513342379) internal successors, (3181), 2211 states have internal predecessors, (3181), 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 14:27:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3181 transitions. [2021-11-19 14:27:18,363 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3181 transitions. Word has length 201 [2021-11-19 14:27:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:18,364 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3181 transitions. [2021-11-19 14:27:18,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 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 14:27:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3181 transitions. [2021-11-19 14:27:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 14:27:18,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:18,368 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:18,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:18,582 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 899409284, now seen corresponding path program 1 times [2021-11-19 14:27:18,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:18,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547060252] [2021-11-19 14:27:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:18,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:18,584 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:18,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:27:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:27:19,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:27:19,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:27:19,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:27:19,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:27:19,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:27:20,034 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:27:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:27:21,367 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:27:21,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:27:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:27:21,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:27:22,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:22,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547060252] [2021-11-19 14:27:22,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547060252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:22,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:22,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:27:22,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457904128] [2021-11-19 14:27:22,284 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:22,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:27:22,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:27:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:22,285 INFO L87 Difference]: Start difference. First operand 2212 states and 3181 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:27:24,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:26,314 WARN L515 Checker$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 14:27:34,496 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:36,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:37,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:41,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:43,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:45,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:46,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:54,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:27:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:59,613 INFO L93 Difference]: Finished difference Result 5400 states and 7731 transitions. [2021-11-19 14:27:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 209 [2021-11-19 14:27:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:59,622 INFO L225 Difference]: With dead ends: 5400 [2021-11-19 14:27:59,622 INFO L226 Difference]: Without dead ends: 3209 [2021-11-19 14:27:59,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:59,627 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 183 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:59,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 704 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 652 Invalid, 3 Unknown, 0 Unchecked, 37.0s Time] [2021-11-19 14:27:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-11-19 14:27:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2380. [2021-11-19 14:27:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 1.4228667507356032) internal successors, (3385), 2379 states have internal predecessors, (3385), 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 14:27:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3385 transitions. [2021-11-19 14:27:59,866 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3385 transitions. Word has length 209 [2021-11-19 14:27:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:59,866 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 3385 transitions. [2021-11-19 14:27:59,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 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 14:27:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3385 transitions. [2021-11-19 14:27:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 14:27:59,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:59,871 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:27:59,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 14:28:00,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:00,095 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1495044440, now seen corresponding path program 1 times [2021-11-19 14:28:00,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:00,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475600855] [2021-11-19 14:28:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:00,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:00,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:00,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:28:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:28:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:01,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:01,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:01,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:01,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:01,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:01,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:01,345 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-19 14:28:01,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-19 14:28:02,739 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:28:02,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-19 14:28:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:28:02,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-19 14:28:03,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:03,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475600855] [2021-11-19 14:28:03,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475600855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:03,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:03,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:28:03,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295462259] [2021-11-19 14:28:03,560 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:03,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:28:03,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:28:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:03,561 INFO L87 Difference]: Start difference. First operand 2380 states and 3385 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 14:28:05,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:07,604 WARN L515 Checker$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 14:28:10,906 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:24,902 INFO L93 Difference]: Finished difference Result 5492 states and 7793 transitions. [2021-11-19 14:28:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:28:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 210 [2021-11-19 14:28:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:24,910 INFO L225 Difference]: With dead ends: 5492 [2021-11-19 14:28:24,910 INFO L226 Difference]: Without dead ends: 3133 [2021-11-19 14:28:24,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:28:24,913 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 171 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:24,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 532 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 474 Invalid, 2 Unknown, 0 Unchecked, 21.0s Time] [2021-11-19 14:28:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-11-19 14:28:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2380. [2021-11-19 14:28:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 1.4102564102564104) internal successors, (3355), 2379 states have internal predecessors, (3355), 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 14:28:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3355 transitions. [2021-11-19 14:28:25,122 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3355 transitions. Word has length 210 [2021-11-19 14:28:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:25,122 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 3355 transitions. [2021-11-19 14:28:25,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 14:28:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3355 transitions. [2021-11-19 14:28:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 14:28:25,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:25,126 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:28:25,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:25,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:25,342 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1940297028, now seen corresponding path program 1 times [2021-11-19 14:28:25,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:25,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641039668] [2021-11-19 14:28:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:25,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:25,344 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:25,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:28:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:28:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:26,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:26,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:26,421 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:28:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:28:26,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:26,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:26,774 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:28:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:28:28,850 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:28:28,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:28:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:28,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:29,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:29,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641039668] [2021-11-19 14:28:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641039668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:29,944 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:29,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:28:29,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041419262] [2021-11-19 14:28:29,945 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:29,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:29,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:29,947 INFO L87 Difference]: Start difference. First operand 2380 states and 3355 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:31,974 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 14:28:37,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:38,964 INFO L93 Difference]: Finished difference Result 5091 states and 7156 transitions. [2021-11-19 14:28:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-19 14:28:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:38,973 INFO L225 Difference]: With dead ends: 5091 [2021-11-19 14:28:38,973 INFO L226 Difference]: Without dead ends: 2732 [2021-11-19 14:28:38,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:38,975 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 60 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:38,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 545 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-19 14:28:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-11-19 14:28:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2636. [2021-11-19 14:28:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.406831119544592) internal successors, (3707), 2635 states have internal predecessors, (3707), 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 14:28:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3707 transitions. [2021-11-19 14:28:39,198 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3707 transitions. Word has length 222 [2021-11-19 14:28:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3707 transitions. [2021-11-19 14:28:39,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3707 transitions. [2021-11-19 14:28:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 14:28:39,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:39,203 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:28:39,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:39,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:39,414 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1457276990, now seen corresponding path program 1 times [2021-11-19 14:28:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670398332] [2021-11-19 14:28:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:39,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:39,416 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:39,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:28:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:28:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:40,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:40,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:40,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:40,422 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 14:28:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-19 14:28:40,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:40,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:40,763 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:28:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-19 14:28:41,925 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:28:41,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-19 14:28:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:41,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:42,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:42,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670398332] [2021-11-19 14:28:42,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670398332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:42,705 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:42,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:28:42,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092704341] [2021-11-19 14:28:42,705 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:42,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:28:42,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:28:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:28:42,707 INFO L87 Difference]: Start difference. First operand 2636 states and 3707 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 14:28:44,727 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 14:28:49,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:50,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:51,714 INFO L93 Difference]: Finished difference Result 5367 states and 7536 transitions. [2021-11-19 14:28:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:28:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 222 [2021-11-19 14:28:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:51,722 INFO L225 Difference]: With dead ends: 5367 [2021-11-19 14:28:51,722 INFO L226 Difference]: Without dead ends: 2752 [2021-11-19 14:28:51,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 436 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:28:51,725 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 30 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:51,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 521 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-19 14:28:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-11-19 14:28:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2732. [2021-11-19 14:28:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 1.4013181984621017) internal successors, (3827), 2731 states have internal predecessors, (3827), 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 14:28:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3827 transitions. [2021-11-19 14:28:51,925 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3827 transitions. Word has length 222 [2021-11-19 14:28:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:51,925 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3827 transitions. [2021-11-19 14:28:51,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 14:28:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3827 transitions. [2021-11-19 14:28:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-19 14:28:51,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:51,930 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:28:51,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:52,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:52,146 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1989337734, now seen corresponding path program 1 times [2021-11-19 14:28:52,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:52,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774968844] [2021-11-19 14:28:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:52,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:52,148 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:52,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:28:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:52,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:28:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:28:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:53,333 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:28:53,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:28:53,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:53,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:28:53,658 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:28:53,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:28:54,386 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:28:54,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:28:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:54,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:28:54,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:54,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774968844] [2021-11-19 14:28:54,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774968844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:54,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:54,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:28:54,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960765547] [2021-11-19 14:28:54,931 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:54,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:28:54,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:54,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:28:54,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:28:54,932 INFO L87 Difference]: Start difference. First operand 2732 states and 3827 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:28:56,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:28:58,968 WARN L515 Checker$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 14:29:12,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:13,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:20,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:23,208 INFO L93 Difference]: Finished difference Result 5969 states and 8353 transitions. [2021-11-19 14:29:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:29:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-19 14:29:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:23,212 INFO L225 Difference]: With dead ends: 5969 [2021-11-19 14:29:23,212 INFO L226 Difference]: Without dead ends: 3258 [2021-11-19 14:29:23,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 464 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:23,214 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 193 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:23,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 636 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 573 Invalid, 2 Unknown, 0 Unchecked, 27.9s Time] [2021-11-19 14:29:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-11-19 14:29:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2732. [2021-11-19 14:29:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 1.3778835591358476) internal successors, (3763), 2731 states have internal predecessors, (3763), 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 14:29:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3763 transitions. [2021-11-19 14:29:23,443 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3763 transitions. Word has length 236 [2021-11-19 14:29:23,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:23,443 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3763 transitions. [2021-11-19 14:29:23,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3763 transitions. [2021-11-19 14:29:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:29:23,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:23,449 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:23,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 14:29:23,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:23,662 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -257956700, now seen corresponding path program 1 times [2021-11-19 14:29:23,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:23,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329188066] [2021-11-19 14:29:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:23,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:23,665 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:23,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:29:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:29:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:29:24,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:29:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:29:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:29:24,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:29:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:29:24,802 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:29:24,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:29:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:29:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:29:24,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:29:25,183 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:29:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:29:26,413 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:29:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:29:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:29:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:29:27,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:27,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329188066] [2021-11-19 14:29:27,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329188066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:27,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:27,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:29:27,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891004438] [2021-11-19 14:29:27,068 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:27,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:29:27,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:29:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:29:27,069 INFO L87 Difference]: Start difference. First operand 2732 states and 3763 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 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 14:29:29,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:31,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:33,123 WARN L515 Checker$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 14:29:47,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:49,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:53,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:56,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:58,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:01,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:03,409 INFO L93 Difference]: Finished difference Result 5969 states and 8226 transitions. [2021-11-19 14:30:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:30:03,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 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 244 [2021-11-19 14:30:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:03,413 INFO L225 Difference]: With dead ends: 5969 [2021-11-19 14:30:03,413 INFO L226 Difference]: Without dead ends: 3258 [2021-11-19 14:30:03,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:03,415 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 185 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:03,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 787 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 716 Invalid, 3 Unknown, 0 Unchecked, 36.0s Time] [2021-11-19 14:30:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-11-19 14:30:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2732. [2021-11-19 14:30:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 1.3625045770779933) internal successors, (3721), 2731 states have internal predecessors, (3721), 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 14:30:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3721 transitions. [2021-11-19 14:30:03,554 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3721 transitions. Word has length 244 [2021-11-19 14:30:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:03,555 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3721 transitions. [2021-11-19 14:30:03,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 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 14:30:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3721 transitions. [2021-11-19 14:30:03,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:30:03,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:03,560 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:30:03,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:03,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:03,774 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1944136538, now seen corresponding path program 1 times [2021-11-19 14:30:03,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:03,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257623339] [2021-11-19 14:30:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:03,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:03,778 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:03,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:30:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:04,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:04,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:05,138 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:30:05,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-19 14:30:06,357 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:30:06,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-19 14:30:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-19 14:30:06,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-19 14:30:06,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:06,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257623339] [2021-11-19 14:30:06,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257623339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:06,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:30:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125188671] [2021-11-19 14:30:06,881 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:06,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:06,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:06,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:06,883 INFO L87 Difference]: Start difference. First operand 2732 states and 3721 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 14:30:08,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:10,925 WARN L515 Checker$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 14:30:17,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:21,834 INFO L93 Difference]: Finished difference Result 5635 states and 7663 transitions. [2021-11-19 14:30:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 244 [2021-11-19 14:30:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:21,843 INFO L225 Difference]: With dead ends: 5635 [2021-11-19 14:30:21,843 INFO L226 Difference]: Without dead ends: 2924 [2021-11-19 14:30:21,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:21,845 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 16 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:21,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 620 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2021-11-19 14:30:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-19 14:30:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2888. [2021-11-19 14:30:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 1.3553862140630413) internal successors, (3913), 2887 states have internal predecessors, (3913), 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 14:30:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 3913 transitions. [2021-11-19 14:30:21,993 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 3913 transitions. Word has length 244 [2021-11-19 14:30:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:21,994 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 3913 transitions. [2021-11-19 14:30:21,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 14:30:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 3913 transitions. [2021-11-19 14:30:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-19 14:30:21,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:21,997 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:22,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:22,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:22,198 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1247855355, now seen corresponding path program 1 times [2021-11-19 14:30:22,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:22,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139816048] [2021-11-19 14:30:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:22,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:22,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:22,201 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:22,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e96ebfb8-2e9c-487e-b263-1cbc831da53d/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:30:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:23,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:30:23,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:23,296 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:30:23,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:30:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:23,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:30:23,651 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:30:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:30:24,896 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:30:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:30:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:30:25,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-19 14:30:25,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:25,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139816048] [2021-11-19 14:30:25,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139816048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:25,537 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:25,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:30:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115588088] [2021-11-19 14:30:25,538 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:25,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:25,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:25,539 INFO L87 Difference]: Start difference. First operand 2888 states and 3913 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 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 14:30:27,557 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 14:30:38,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:40,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []