./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:25:56,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:25:56,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:25:56,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:25:56,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:25:56,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:25:56,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:25:56,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:25:56,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:25:56,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:25:56,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:25:56,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:25:56,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:25:56,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:25:56,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:25:56,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:25:56,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:25:56,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:25:56,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:25:56,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:25:56,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:25:56,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:25:56,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:25:56,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:25:56,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:25:56,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:25:56,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:25:56,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:25:56,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:25:56,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:25:56,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:25:56,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:25:56,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:25:56,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:25:56,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:25:56,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:25:56,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:25:56,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:25:56,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:25:56,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:25:56,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:25:56,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:25:56,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:25:56,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:25:56,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:25:56,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:25:56,751 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:25:56,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:25:56,752 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:25:56,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:25:56,760 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:25:56,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:25:56,762 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:25:56,763 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:25:56,763 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:25:56,763 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:25:56,764 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:25:56,764 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:25:56,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:25:56,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:25:56,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:25:56,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:25:56,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:25:56,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:25:56,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:25:56,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:25:56,779 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:25:56,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:25:56,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:25:56,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:25:56,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:25:56,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:25:56,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:25:56,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:25:56,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:25:56,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:25:56,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:25:56,786 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:25:56,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:25:56,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:25:56,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:25:56,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:25:56,788 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2021-11-19 13:25:57,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:25:57,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:25:57,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:25:57,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:25:57,149 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:25:57,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-11-19 13:25:57,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/2f93d87d7/378f1bce5fcd45b89307c28cae903110/FLAG5bce4ef06 [2021-11-19 13:25:58,003 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:25:58,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-11-19 13:25:58,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/2f93d87d7/378f1bce5fcd45b89307c28cae903110/FLAG5bce4ef06 [2021-11-19 13:25:58,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/2f93d87d7/378f1bce5fcd45b89307c28cae903110 [2021-11-19 13:25:58,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:25:58,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:25:58,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:25:58,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:25:58,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:25:58,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:25:58" (1/1) ... [2021-11-19 13:25:58,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccad921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:25:58, skipping insertion in model container [2021-11-19 13:25:58,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:25:58" (1/1) ... [2021-11-19 13:25:58,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:25:58,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:25:58,863 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-11-19 13:25:58,892 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:25:58,913 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 13:25:58,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5218daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:25:58, skipping insertion in model container [2021-11-19 13:25:58,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:25:58,915 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:25:58,918 INFO L158 Benchmark]: Toolchain (without parser) took 774.36ms. Allocated memory is still 123.7MB. Free memory was 88.0MB in the beginning and 88.3MB in the end (delta: -298.8kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:25:58,920 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:25:58,922 INFO L158 Benchmark]: CACSL2BoogieTranslator took 769.14ms. Allocated memory is still 123.7MB. Free memory was 87.7MB in the beginning and 88.3MB in the end (delta: -555.0kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 13:25:58,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 81.8MB. Free memory was 38.6MB in the beginning and 38.6MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 769.14ms. Allocated memory is still 123.7MB. Free memory was 87.7MB in the beginning and 88.3MB in the end (delta: -555.0kB). 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:26:01,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:26:01,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:26:01,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:26:01,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:26:01,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:26:01,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:26:01,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:26:01,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:26:01,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:26:01,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:26:01,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:26:01,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:26:01,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:26:01,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:26:01,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:26:01,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:26:01,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:26:01,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:26:01,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:26:01,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:26:01,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:26:01,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:26:01,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:26:01,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:26:01,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:26:01,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:26:01,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:26:01,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:26:01,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:26:01,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:26:01,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:26:01,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:26:01,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:26:01,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:26:01,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:26:01,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:26:01,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:26:01,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:26:01,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:26:01,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:26:01,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:26:01,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:26:01,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:26:01,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:26:01,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:26:01,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:26:01,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:26:01,865 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:26:01,866 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:26:01,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:26:01,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:26:01,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:26:01,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:26:01,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:26:01,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:26:01,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:26:01,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:26:01,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:26:01,871 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:26:01,871 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:26:01,872 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:26:01,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:26:01,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:26:01,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:26:01,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:26:01,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:26:01,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:26:01,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:26:01,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:26:01,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:26:01,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:26:01,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:26:01,875 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:26:01,875 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:26:01,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:26:01,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:26:01,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:26:01,877 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2021-11-19 13:26:02,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:26:02,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:26:02,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:26:02,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:26:02,415 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:26:02,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-11-19 13:26:02,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/f2ada321b/917408af46264b6282755d98bbb1cdda/FLAGf66015f6e [2021-11-19 13:26:03,330 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:26:03,331 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2021-11-19 13:26:03,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/f2ada321b/917408af46264b6282755d98bbb1cdda/FLAGf66015f6e [2021-11-19 13:26:03,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/data/f2ada321b/917408af46264b6282755d98bbb1cdda [2021-11-19 13:26:03,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:26:03,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:26:03,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:26:03,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:26:03,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:26:03,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:03" (1/1) ... [2021-11-19 13:26:03,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2761bb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:03, skipping insertion in model container [2021-11-19 13:26:03,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:03" (1/1) ... [2021-11-19 13:26:03,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:26:03,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:26:04,298 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-11-19 13:26:04,311 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:26:04,372 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:26:04,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:26:04,535 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-11-19 13:26:04,539 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:26:04,548 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:26:04,734 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_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c[77660,77673] [2021-11-19 13:26:04,737 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:26:04,769 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:26:04,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04 WrapperNode [2021-11-19 13:26:04,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:26:04,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:26:04,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:26:04,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:26:04,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:04,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:04,917 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 779 [2021-11-19 13:26:04,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:26:04,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:26:04,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:26:04,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:26:04,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:04,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:04,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:04,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:05,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:05,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:05,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:05,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:26:05,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:26:05,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:26:05,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:26:05,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (1/1) ... [2021-11-19 13:26:05,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:26:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:26:05,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:26:05,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:26:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:26:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:26:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:26:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:26:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:26:05,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:26:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:26:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:26:05,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:26:05,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:26:05,435 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:26:05,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:26:05,460 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 13:26:15,492 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 13:26:15,493 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 13:26:15,493 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:26:15,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:26:15,508 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:26:15,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:15 BoogieIcfgContainer [2021-11-19 13:26:15,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:26:15,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:26:15,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:26:15,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:26:15,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:26:03" (1/3) ... [2021-11-19 13:26:15,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438993ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:15, skipping insertion in model container [2021-11-19 13:26:15,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:04" (2/3) ... [2021-11-19 13:26:15,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@438993ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:15, skipping insertion in model container [2021-11-19 13:26:15,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:15" (3/3) ... [2021-11-19 13:26:15,523 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-2.c [2021-11-19 13:26:15,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:26:15,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:26:15,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:26:15,648 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 13:26:15,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:26:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 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 13:26:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 13:26:15,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:15,695 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] [2021-11-19 13:26:15,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453347, now seen corresponding path program 1 times [2021-11-19 13:26:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:15,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783020504] [2021-11-19 13:26:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:15,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:15,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:15,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:26:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:16,354 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 13:26:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:16,600 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 13:26:16,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:16,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783020504] [2021-11-19 13:26:16,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783020504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:16,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:16,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:16,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213563290] [2021-11-19 13:26:16,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:16,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:16,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:16,653 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 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 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 13:26:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:17,065 INFO L93 Difference]: Finished difference Result 598 states and 1032 transitions. [2021-11-19 13:26:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 46 [2021-11-19 13:26:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:17,085 INFO L225 Difference]: With dead ends: 598 [2021-11-19 13:26:17,085 INFO L226 Difference]: Without dead ends: 410 [2021-11-19 13:26:17,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 13:26:17,098 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 400 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:17,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 667 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:26:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-19 13:26:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-19 13:26:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.5378973105134475) internal successors, (629), 409 states have internal predecessors, (629), 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 13:26:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 629 transitions. [2021-11-19 13:26:17,205 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 629 transitions. Word has length 46 [2021-11-19 13:26:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:17,205 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 629 transitions. [2021-11-19 13:26:17,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 13:26:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 629 transitions. [2021-11-19 13:26:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 13:26:17,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:17,214 INFO L514 BasicCegarLoop]: trace histogram [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, 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 13:26:17,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:17,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:17,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -204372774, now seen corresponding path program 1 times [2021-11-19 13:26:17,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:17,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571114083] [2021-11-19 13:26:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:17,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:17,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:17,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:26:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:17,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:18,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:18,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:18,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571114083] [2021-11-19 13:26:18,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571114083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:18,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:18,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:18,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233042987] [2021-11-19 13:26:18,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:18,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:18,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:18,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:18,512 INFO L87 Difference]: Start difference. First operand 410 states and 629 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 13:26:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:19,075 INFO L93 Difference]: Finished difference Result 939 states and 1467 transitions. [2021-11-19 13:26:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 108 [2021-11-19 13:26:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:19,081 INFO L225 Difference]: With dead ends: 939 [2021-11-19 13:26:19,081 INFO L226 Difference]: Without dead ends: 672 [2021-11-19 13:26:19,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 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 13:26:19,084 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 310 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:19,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 725 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:26:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-19 13:26:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2021-11-19 13:26:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.527570789865872) internal successors, (1025), 671 states have internal predecessors, (1025), 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 13:26:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1025 transitions. [2021-11-19 13:26:19,121 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1025 transitions. Word has length 108 [2021-11-19 13:26:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:19,122 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1025 transitions. [2021-11-19 13:26:19,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 13:26:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1025 transitions. [2021-11-19 13:26:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 13:26:19,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:19,130 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 13:26:19,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:19,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:19,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash -575897374, now seen corresponding path program 1 times [2021-11-19 13:26:19,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:19,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588335770] [2021-11-19 13:26:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:19,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:19,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:19,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:19,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:26:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:26:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:26:20,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:20,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588335770] [2021-11-19 13:26:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588335770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:20,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:20,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:20,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470176097] [2021-11-19 13:26:20,783 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:20,787 INFO L87 Difference]: Start difference. First operand 672 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 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 13:26:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:21,330 INFO L93 Difference]: Finished difference Result 1466 states and 2262 transitions. [2021-11-19 13:26:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:21,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 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 173 [2021-11-19 13:26:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:21,338 INFO L225 Difference]: With dead ends: 1466 [2021-11-19 13:26:21,338 INFO L226 Difference]: Without dead ends: 937 [2021-11-19 13:26:21,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 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 13:26:21,341 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 311 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:21,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 731 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:26:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-19 13:26:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 937. [2021-11-19 13:26:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.5213675213675213) internal successors, (1424), 936 states have internal predecessors, (1424), 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 13:26:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1424 transitions. [2021-11-19 13:26:21,381 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1424 transitions. Word has length 173 [2021-11-19 13:26:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:21,382 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1424 transitions. [2021-11-19 13:26:21,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 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 13:26:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1424 transitions. [2021-11-19 13:26:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-19 13:26:21,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:21,397 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:21,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:21,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:21,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash -234376531, now seen corresponding path program 1 times [2021-11-19 13:26:21,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:21,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514812899] [2021-11-19 13:26:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:21,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:21,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:21,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:26:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 13:26:22,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-19 13:26:23,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:23,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514812899] [2021-11-19 13:26:23,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514812899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:23,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:23,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:23,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419392713] [2021-11-19 13:26:23,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:23,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:23,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:23,232 INFO L87 Difference]: Start difference. First operand 937 states and 1424 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 13:26:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:23,724 INFO L93 Difference]: Finished difference Result 1994 states and 3055 transitions. [2021-11-19 13:26:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:23,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 238 [2021-11-19 13:26:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:23,734 INFO L225 Difference]: With dead ends: 1994 [2021-11-19 13:26:23,735 INFO L226 Difference]: Without dead ends: 1200 [2021-11-19 13:26:23,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 472 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 13:26:23,739 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 319 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:23,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 729 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:26:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-19 13:26:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1200. [2021-11-19 13:26:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 1.5162635529608006) internal successors, (1818), 1199 states have internal predecessors, (1818), 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 13:26:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1818 transitions. [2021-11-19 13:26:23,793 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1818 transitions. Word has length 238 [2021-11-19 13:26:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:23,797 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1818 transitions. [2021-11-19 13:26:23,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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 13:26:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1818 transitions. [2021-11-19 13:26:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-19 13:26:23,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:23,805 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:23,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:24,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:24,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1442995500, now seen corresponding path program 1 times [2021-11-19 13:26:24,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:24,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083658978] [2021-11-19 13:26:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:24,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:24,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:24,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:26:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 485 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-19 13:26:25,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 485 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-19 13:26:26,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:26,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083658978] [2021-11-19 13:26:26,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083658978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:26,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:26,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:26,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556100318] [2021-11-19 13:26:26,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:26,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:26,104 INFO L87 Difference]: Start difference. First operand 1200 states and 1818 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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 13:26:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:26,679 INFO L93 Difference]: Finished difference Result 2520 states and 3841 transitions. [2021-11-19 13:26:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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 311 [2021-11-19 13:26:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:26,688 INFO L225 Difference]: With dead ends: 2520 [2021-11-19 13:26:26,689 INFO L226 Difference]: Without dead ends: 1463 [2021-11-19 13:26:26,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 618 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 13:26:26,691 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 313 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:26,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 729 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:26:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-11-19 13:26:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1463. [2021-11-19 13:26:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 1.5116279069767442) internal successors, (2210), 1462 states have internal predecessors, (2210), 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 13:26:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 2210 transitions. [2021-11-19 13:26:26,756 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 2210 transitions. Word has length 311 [2021-11-19 13:26:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:26,757 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 2210 transitions. [2021-11-19 13:26:26,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 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 13:26:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 2210 transitions. [2021-11-19 13:26:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-19 13:26:26,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:26,766 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:26,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 13:26:26,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:26,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1296017864, now seen corresponding path program 1 times [2021-11-19 13:26:26,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:26,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707931170] [2021-11-19 13:26:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:26,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:26,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:26,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:26:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-19 13:26:28,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 726 proven. 0 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-11-19 13:26:29,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:29,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707931170] [2021-11-19 13:26:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707931170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:29,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:29,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:29,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184728186] [2021-11-19 13:26:29,396 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:29,398 INFO L87 Difference]: Start difference. First operand 1463 states and 2210 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 13:26:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:30,136 INFO L93 Difference]: Finished difference Result 3044 states and 4620 transitions. [2021-11-19 13:26:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 384 [2021-11-19 13:26:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:30,148 INFO L225 Difference]: With dead ends: 3044 [2021-11-19 13:26:30,148 INFO L226 Difference]: Without dead ends: 1724 [2021-11-19 13:26:30,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 764 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 13:26:30,152 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 313 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:30,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 728 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:26:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2021-11-19 13:26:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1724. [2021-11-19 13:26:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.5078351712130005) internal successors, (2598), 1723 states have internal predecessors, (2598), 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 13:26:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2598 transitions. [2021-11-19 13:26:30,239 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2598 transitions. Word has length 384 [2021-11-19 13:26:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:30,240 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2598 transitions. [2021-11-19 13:26:30,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 13:26:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2598 transitions. [2021-11-19 13:26:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-19 13:26:30,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:30,252 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 4, 4, 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, 1, 1, 1, 1, 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 13:26:30,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:30,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:30,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 442748388, now seen corresponding path program 1 times [2021-11-19 13:26:30,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:30,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20042751] [2021-11-19 13:26:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:30,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:30,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:30,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:26:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 1043 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-19 13:26:32,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 1043 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-19 13:26:33,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:33,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20042751] [2021-11-19 13:26:33,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20042751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:33,214 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:33,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:33,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553384840] [2021-11-19 13:26:33,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:33,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:33,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:33,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:33,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:33,217 INFO L87 Difference]: Start difference. First operand 1724 states and 2598 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 13:26:33,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:33,888 INFO L93 Difference]: Finished difference Result 3567 states and 5396 transitions. [2021-11-19 13:26:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 456 [2021-11-19 13:26:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:33,902 INFO L225 Difference]: With dead ends: 3567 [2021-11-19 13:26:33,902 INFO L226 Difference]: Without dead ends: 1986 [2021-11-19 13:26:33,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 908 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 13:26:33,908 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 321 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:33,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 729 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:26:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-11-19 13:26:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1986. [2021-11-19 13:26:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.5037783375314862) internal successors, (2985), 1985 states have internal predecessors, (2985), 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 13:26:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 2985 transitions. [2021-11-19 13:26:33,996 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 2985 transitions. Word has length 456 [2021-11-19 13:26:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:33,996 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 2985 transitions. [2021-11-19 13:26:33,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 13:26:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 2985 transitions. [2021-11-19 13:26:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-11-19 13:26:34,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:34,003 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:34,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:34,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:34,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1209650667, now seen corresponding path program 1 times [2021-11-19 13:26:34,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:34,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054828755] [2021-11-19 13:26:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:34,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:34,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:26:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 1206 proven. 0 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 13:26:35,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 1206 proven. 0 refuted. 0 times theorem prover too weak. 1004 trivial. 0 not checked. [2021-11-19 13:26:36,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:36,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054828755] [2021-11-19 13:26:36,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054828755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:36,917 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:36,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:36,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179543302] [2021-11-19 13:26:36,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:36,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:36,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:36,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:36,920 INFO L87 Difference]: Start difference. First operand 1986 states and 2985 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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 13:26:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:37,614 INFO L93 Difference]: Finished difference Result 4091 states and 6168 transitions. [2021-11-19 13:26:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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 501 [2021-11-19 13:26:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:37,629 INFO L225 Difference]: With dead ends: 4091 [2021-11-19 13:26:37,629 INFO L226 Difference]: Without dead ends: 2248 [2021-11-19 13:26:37,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 998 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 13:26:37,632 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 317 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:37,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 729 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:26:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-11-19 13:26:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2248. [2021-11-19 13:26:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 1.4997774810858924) internal successors, (3370), 2247 states have internal predecessors, (3370), 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 13:26:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 3370 transitions. [2021-11-19 13:26:37,731 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 3370 transitions. Word has length 501 [2021-11-19 13:26:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:37,731 INFO L470 AbstractCegarLoop]: Abstraction has 2248 states and 3370 transitions. [2021-11-19 13:26:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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 13:26:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 3370 transitions. [2021-11-19 13:26:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-19 13:26:37,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:37,739 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 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, 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 13:26:37,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:37,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:37,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1531921159, now seen corresponding path program 1 times [2021-11-19 13:26:37,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:37,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921858674] [2021-11-19 13:26:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:37,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:37,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:37,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:37,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:26:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 1629 proven. 0 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2021-11-19 13:26:40,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 1629 proven. 0 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2021-11-19 13:26:41,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:41,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921858674] [2021-11-19 13:26:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921858674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:41,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:41,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:26:41,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307716114] [2021-11-19 13:26:41,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:41,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:41,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:41,281 INFO L87 Difference]: Start difference. First operand 2248 states and 3370 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 13:26:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:41,978 INFO L93 Difference]: Finished difference Result 4616 states and 6938 transitions. [2021-11-19 13:26:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 575 [2021-11-19 13:26:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:41,994 INFO L225 Difference]: With dead ends: 4616 [2021-11-19 13:26:41,994 INFO L226 Difference]: Without dead ends: 2511 [2021-11-19 13:26:41,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1146 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 13:26:42,000 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 319 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:42,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 727 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:26:42,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-11-19 13:26:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2021-11-19 13:26:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2510 states have (on average 1.49601593625498) internal successors, (3755), 2510 states have internal predecessors, (3755), 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 13:26:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3755 transitions. [2021-11-19 13:26:42,114 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3755 transitions. Word has length 575 [2021-11-19 13:26:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 2511 states and 3755 transitions. [2021-11-19 13:26:42,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 13:26:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3755 transitions. [2021-11-19 13:26:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2021-11-19 13:26:42,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:42,128 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:42,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:42,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:42,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:42,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1391653982, now seen corresponding path program 1 times [2021-11-19 13:26:42,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:42,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788799477] [2021-11-19 13:26:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:42,351 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:42,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:27:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:27:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:16,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:16,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:16,572 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 13:27:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 13:27:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:16,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:17,057 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:27:17,057 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 13:27:19,598 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:27:19,599 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 13:27:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2135 proven. 0 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2021-11-19 13:27:20,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2135 proven. 0 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2021-11-19 13:27:21,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:21,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788799477] [2021-11-19 13:27:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788799477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:21,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:27:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165684103] [2021-11-19 13:27:21,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:27:21,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:27:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:27:21,566 INFO L87 Difference]: Start difference. First operand 2511 states and 3755 transitions. Second operand has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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 13:27:23,599 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 13:27:25,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:39,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:40,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:43,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:46,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:56,716 WARN L515 Checker$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 13:27:57,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:04,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:05,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:08,386 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:15,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:16,086 WARN L515 Checker$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 13:28:23,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:25,279 WARN L515 Checker$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 13:28:28,420 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 13:28:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:31,949 INFO L93 Difference]: Finished difference Result 11261 states and 16910 transitions. [2021-11-19 13:28:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:28:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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 649 [2021-11-19 13:28:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:32,033 INFO L225 Difference]: With dead ends: 11261 [2021-11-19 13:28:32,033 INFO L226 Difference]: Without dead ends: 8760 [2021-11-19 13:28:32,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1290 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:28:32,039 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 387 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 85 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:32,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1452 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1176 Invalid, 4 Unknown, 0 Unchecked, 69.8s Time] [2021-11-19 13:28:32,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8760 states. [2021-11-19 13:28:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8760 to 3324. [2021-11-19 13:28:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 1.5747818236533253) internal successors, (5233), 3323 states have internal predecessors, (5233), 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 13:28:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 5233 transitions. [2021-11-19 13:28:32,333 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 5233 transitions. Word has length 649 [2021-11-19 13:28:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:32,334 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 5233 transitions. [2021-11-19 13:28:32,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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 13:28:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 5233 transitions. [2021-11-19 13:28:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2021-11-19 13:28:32,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:32,347 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:32,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:32,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:32,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:28:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -890583648, now seen corresponding path program 1 times [2021-11-19 13:28:32,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:32,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915484361] [2021-11-19 13:28:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:32,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:32,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:32,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:32,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:31:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:31:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:13,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:13,120 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:31:13,121 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 13:31:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:13,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:13,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:13,554 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:31:13,555 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 13:31:14,841 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:31:14,841 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 110 treesize of output 38 [2021-11-19 13:31:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 733 proven. 0 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2021-11-19 13:31:16,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 733 proven. 0 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2021-11-19 13:31:18,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:18,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915484361] [2021-11-19 13:31:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915484361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:18,127 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:18,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:31:18,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290403167] [2021-11-19 13:31:18,128 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:18,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:31:18,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:31:18,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:31:18,130 INFO L87 Difference]: Start difference. First operand 3324 states and 5233 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 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 13:31:20,165 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 13:31:39,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:40,708 WARN L515 Checker$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 13:31:42,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:44,053 WARN L515 Checker$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 13:31:57,996 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 13:32:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:03,309 INFO L93 Difference]: Finished difference Result 11027 states and 17076 transitions. [2021-11-19 13:32:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:32:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 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 649 [2021-11-19 13:32:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:03,348 INFO L225 Difference]: With dead ends: 11027 [2021-11-19 13:32:03,348 INFO L226 Difference]: Without dead ends: 7713 [2021-11-19 13:32:03,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1290 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 13:32:03,354 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 294 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:03,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1053 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 855 Invalid, 1 Unknown, 0 Unchecked, 44.8s Time] [2021-11-19 13:32:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7713 states. [2021-11-19 13:32:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7713 to 4212. [2021-11-19 13:32:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 1.6114937069579671) internal successors, (6786), 4211 states have internal predecessors, (6786), 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 13:32:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 6786 transitions. [2021-11-19 13:32:03,685 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 6786 transitions. Word has length 649 [2021-11-19 13:32:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:03,685 INFO L470 AbstractCegarLoop]: Abstraction has 4212 states and 6786 transitions. [2021-11-19 13:32:03,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 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 13:32:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 6786 transitions. [2021-11-19 13:32:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2021-11-19 13:32:03,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:03,700 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:03,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 13:32:03,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:03,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1235463390, now seen corresponding path program 1 times [2021-11-19 13:32:03,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:03,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594085765] [2021-11-19 13:32:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:03,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:03,931 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:03,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e648fb51-5f1b-4f47-9ff5-8c5565fb769a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:37:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 13:37:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 28 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 4141 treesize of output 4105 [2021-11-19 13:37:08,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:37:08,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78431 [2021-11-19 13:37:08,179 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:37:08,182 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 214806 [2021-11-19 13:37:08,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:37:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver