./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF --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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:14,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:14,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:14,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:14,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:14,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:14,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:14,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:14,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:14,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:14,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:14,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:14,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:14,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:14,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:14,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:14,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:14,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:14,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:14,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:14,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:14,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:14,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:14,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:14,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:14,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:14,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:14,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:14,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:14,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:14,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:14,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:14,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:14,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:14,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:14,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:14,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:14,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:14,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:14,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:14,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:14,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:50:14,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:14,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:14,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:14,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:14,774 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:14,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:14,774 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:14,774 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:50:14,775 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:14,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:14,775 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:50:14,775 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:50:14,775 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:14,776 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:50:14,776 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:50:14,776 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:50:14,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:14,777 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:50:14,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:50:14,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:50:14,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:14,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:14,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:14,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:14,778 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:14,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:50:14,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:14,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:14,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:14,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:14,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:14,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:14,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:14,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:14,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:14,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:50:14,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:50:14,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:14,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:14,781 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:14,781 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-12 22:50:15,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:15,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:15,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:15,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:15,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:15,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-12 22:50:15,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/b466c4234/2b1d2bc831a846498db079f459aa6f84/FLAGfc6976354 [2021-11-12 22:50:15,819 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:15,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-12 22:50:15,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/b466c4234/2b1d2bc831a846498db079f459aa6f84/FLAGfc6976354 [2021-11-12 22:50:16,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/b466c4234/2b1d2bc831a846498db079f459aa6f84 [2021-11-12 22:50:16,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:16,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:16,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:16,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:16,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:16,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:16" (1/1) ... [2021-11-12 22:50:16,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d6149e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:16, skipping insertion in model container [2021-11-12 22:50:16,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:16" (1/1) ... [2021-11-12 22:50:16,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:16,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:16,579 WARN L228 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-12 22:50:16,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:16,607 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) [2021-11-12 22:50:16,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70dbd552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:16, skipping insertion in model container [2021-11-12 22:50:16,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:16,613 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:50:16,615 INFO L158 Benchmark]: Toolchain (without parser) took 575.14ms. Allocated memory is still 104.9MB. Free memory was 64.3MB in the beginning and 70.8MB in the end (delta: -6.5MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-12 22:50:16,617 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory was 83.7MB in the beginning and 83.6MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:50:16,618 INFO L158 Benchmark]: CACSL2BoogieTranslator took 568.61ms. Allocated memory is still 104.9MB. Free memory was 64.1MB in the beginning and 70.8MB in the end (delta: -6.7MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-12 22:50:16,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory was 83.7MB in the beginning and 83.6MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 568.61ms. Allocated memory is still 104.9MB. Free memory was 64.1MB in the beginning and 70.8MB in the end (delta: -6.7MB). Peak memory consumption was 10.7MB. 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF --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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:18,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:18,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:18,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:18,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:18,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:18,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:18,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:18,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:18,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:18,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:18,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:18,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:18,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:18,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:18,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:18,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:18,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:18,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:18,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:18,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:18,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:18,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:18,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:18,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:18,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:18,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:18,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:18,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:18,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:18,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:18,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:18,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:18,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:18,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:18,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:18,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:18,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:18,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:18,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:18,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:18,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:50:18,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:18,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:18,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:18,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:18,947 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:18,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:18,948 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:18,948 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:18,948 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:18,948 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:18,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:18,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:50:18,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:50:18,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:18,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:18,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:18,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:18,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:18,951 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:50:18,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:50:18,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:50:18,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:18,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:18,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:18,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:18,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:50:18,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:18,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:18,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:18,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:18,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:18,954 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:50:18,955 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:18,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:18,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:18,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:18,956 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-12 22:50:19,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:19,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:19,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:19,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:19,339 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:19,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-12 22:50:19,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/72989fd25/fbaa87de2b05415e96ee1619b3a38a3b/FLAG5baff37b6 [2021-11-12 22:50:20,080 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:20,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-12 22:50:20,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/72989fd25/fbaa87de2b05415e96ee1619b3a38a3b/FLAG5baff37b6 [2021-11-12 22:50:20,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/data/72989fd25/fbaa87de2b05415e96ee1619b3a38a3b [2021-11-12 22:50:20,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:20,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:20,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:20,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:20,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:20,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:20" (1/1) ... [2021-11-12 22:50:20,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:20, skipping insertion in model container [2021-11-12 22:50:20,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:20" (1/1) ... [2021-11-12 22:50:20,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:20,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:20,855 WARN L228 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-12 22:50:20,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:20,918 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:50:20,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:21,124 WARN L228 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-12 22:50:21,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:21,151 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:50:21,277 WARN L228 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_fe06a7f0-e211-449e-b42e-4e7c6f007372/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-12 22:50:21,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:21,306 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:50:21,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21 WrapperNode [2021-11-12 22:50:21,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:21,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:21,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:50:21,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:50:21,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:21,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:50:21,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:50:21,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:50:21,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:50:21,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:50:21,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:50:21,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:50:21,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (1/1) ... [2021-11-12 22:50:21,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:21,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:21,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:50:21,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:50:21,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:50:21,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:50:21,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:50:21,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:50:21,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:50:21,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:50:21,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:50:21,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:50:21,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:50:21,944 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 22:50:30,086 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-12 22:50:30,086 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-12 22:50:30,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:50:30,094 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:50:30,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:30 BoogieIcfgContainer [2021-11-12 22:50:30,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:50:30,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:50:30,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:50:30,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:50:30,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:50:20" (1/3) ... [2021-11-12 22:50:30,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b7d4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:30, skipping insertion in model container [2021-11-12 22:50:30,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:21" (2/3) ... [2021-11-12 22:50:30,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b7d4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:50:30, skipping insertion in model container [2021-11-12 22:50:30,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:50:30" (3/3) ... [2021-11-12 22:50:30,104 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-11-12 22:50:30,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:50:30,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:50:30,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:50:30,165 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 [2021-11-12 22:50:30,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:50:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 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) [2021-11-12 22:50:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:50:30,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:30,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:30,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-11-12 22:50:30,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:30,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571545963] [2021-11-12 22:50:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:30,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:30,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:30,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:50:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:50:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:30,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:31,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:31,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571545963] [2021-11-12 22:50:31,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571545963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:31,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:31,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:50:31,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114165603] [2021-11-12 22:50:31,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:31,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:31,227 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 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 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-11-12 22:50:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:31,375 INFO L93 Difference]: Finished difference Result 553 states and 933 transitions. [2021-11-12 22:50:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 48 [2021-11-12 22:50:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:31,392 INFO L225 Difference]: With dead ends: 553 [2021-11-12 22:50:31,393 INFO L226 Difference]: Without dead ends: 377 [2021-11-12 22:50:31,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:31,400 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:31,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 677 Invalid, 45 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 70.02ms Time] [2021-11-12 22:50:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-12 22:50:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-11-12 22:50:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5186170212765957) internal successors, (571), 376 states have internal predecessors, (571), 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) [2021-11-12 22:50:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 571 transitions. [2021-11-12 22:50:31,464 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 571 transitions. Word has length 48 [2021-11-12 22:50:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:31,465 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 571 transitions. [2021-11-12 22:50:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-11-12 22:50:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 571 transitions. [2021-11-12 22:50:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:50:31,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:31,472 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, 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] [2021-11-12 22:50:31,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:31,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:31,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash -511791490, now seen corresponding path program 1 times [2021-11-12 22:50:31,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:31,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921882281] [2021-11-12 22:50:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:31,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:31,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:31,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:31,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:50:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:50:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:32,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:32,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:32,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921882281] [2021-11-12 22:50:32,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921882281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:32,920 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:32,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:50:32,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516255609] [2021-11-12 22:50:32,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:32,923 INFO L87 Difference]: Start difference. First operand 377 states and 571 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2021-11-12 22:50:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:33,103 INFO L93 Difference]: Finished difference Result 860 states and 1312 transitions. [2021-11-12 22:50:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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 [2021-11-12 22:50:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:33,109 INFO L225 Difference]: With dead ends: 860 [2021-11-12 22:50:33,109 INFO L226 Difference]: Without dead ends: 614 [2021-11-12 22:50:33,111 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 [2021-11-12 22:50:33,113 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 290 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:33,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 729 Invalid, 44 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [12 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 148.72ms Time] [2021-11-12 22:50:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-12 22:50:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-12 22:50:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.5154975530179446) internal successors, (929), 613 states have internal predecessors, (929), 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) [2021-11-12 22:50:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 929 transitions. [2021-11-12 22:50:33,156 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 929 transitions. Word has length 108 [2021-11-12 22:50:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:33,156 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 929 transitions. [2021-11-12 22:50:33,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2021-11-12 22:50:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 929 transitions. [2021-11-12 22:50:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 22:50:33,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:33,163 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, 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] [2021-11-12 22:50:33,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:50:33,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:33,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:33,377 INFO L85 PathProgramCache]: Analyzing trace with hash -868750118, now seen corresponding path program 1 times [2021-11-12 22:50:33,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:33,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524718535] [2021-11-12 22:50:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:33,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:33,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:33,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:33,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:50:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:33,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:50:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:50:34,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 22:50:34,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:34,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524718535] [2021-11-12 22:50:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524718535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:34,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:34,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:50:34,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086102122] [2021-11-12 22:50:34,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:34,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:50:34,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:50:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:34,870 INFO L87 Difference]: Start difference. First operand 614 states and 929 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2021-11-12 22:50:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:35,084 INFO L93 Difference]: Finished difference Result 1336 states and 2029 transitions. [2021-11-12 22:50:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:50:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-12 22:50:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:35,093 INFO L225 Difference]: With dead ends: 1336 [2021-11-12 22:50:35,093 INFO L226 Difference]: Without dead ends: 853 [2021-11-12 22:50:35,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:50:35,101 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 296 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:35,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 732 Invalid, 43 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 166.97ms Time] [2021-11-12 22:50:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-12 22:50:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-12 22:50:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.511737089201878) internal successors, (1288), 852 states have internal predecessors, (1288), 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) [2021-11-12 22:50:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1288 transitions. [2021-11-12 22:50:35,155 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1288 transitions. Word has length 169 [2021-11-12 22:50:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:35,156 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1288 transitions. [2021-11-12 22:50:35,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2021-11-12 22:50:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1288 transitions. [2021-11-12 22:50:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:50:35,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:35,161 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 22:50:35,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:35,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:35,376 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash -438302228, now seen corresponding path program 1 times [2021-11-12 22:50:35,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:35,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492703708] [2021-11-12 22:50:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:35,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:35,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:35,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:50:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:50:36,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:36,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:50:36,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-12 22:50:36,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:36,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-12 22:50:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-12 22:50:36,858 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-12 22:50:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 797 treesize of output 769 [2021-11-12 22:50:36,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:36,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-12 22:50:36,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-12 22:50:36,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,113 INFO L244 Elim1Store]: Index analysis took 101 ms [2021-11-12 22:50:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-12 22:50:37,250 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-12 22:50:37,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:50:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:37,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-12 22:50:37,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-12 22:50:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-12 22:50:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-12 22:50:37,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:38,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,697 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-12 22:50:38,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-12 22:50:38,858 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-12 22:50:38,868 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-12 22:50:38,881 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-12 22:50:38,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:50:38,905 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-12 22:50:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-12 22:50:39,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:39,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492703708] [2021-11-12 22:50:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492703708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:39,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:39,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:50:39,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439738222] [2021-11-12 22:50:39,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:39,223 INFO L87 Difference]: Start difference. First operand 853 states and 1288 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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) [2021-11-12 22:50:41,261 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 [] [2021-11-12 22:50:43,271 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 [] [2021-11-12 22:50:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:52,631 INFO L93 Difference]: Finished difference Result 1703 states and 2572 transitions. [2021-11-12 22:50:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:50:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-12 22:50:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:52,640 INFO L225 Difference]: With dead ends: 1703 [2021-11-12 22:50:52,641 INFO L226 Difference]: Without dead ends: 853 [2021-11-12 22:50:52,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:50:52,644 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 12 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12941.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 13282.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 985 Invalid, 232 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 2 Unknown, 58 Unchecked, 13282.65ms Time] [2021-11-12 22:50:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-12 22:50:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-12 22:50:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.5105633802816902) internal successors, (1287), 852 states have internal predecessors, (1287), 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) [2021-11-12 22:50:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1287 transitions. [2021-11-12 22:50:52,687 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1287 transitions. Word has length 210 [2021-11-12 22:50:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:52,687 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1287 transitions. [2021-11-12 22:50:52,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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) [2021-11-12 22:50:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1287 transitions. [2021-11-12 22:50:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:50:52,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:52,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 22:50:52,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:52,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:52,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:50:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1311967830, now seen corresponding path program 1 times [2021-11-12 22:50:52,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:52,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368248422] [2021-11-12 22:50:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:52,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:52,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:52,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:50:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:50:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:50:54,000 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:50:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 22:50:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:50:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:50:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:50:54,591 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:50:54,592 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 [2021-11-12 22:50:56,211 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:50:56,212 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 [2021-11-12 22:50:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-12 22:50:56,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-12 22:50:57,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:57,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368248422] [2021-11-12 22:50:57,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368248422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:57,843 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:57,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-12 22:50:57,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637350010] [2021-11-12 22:50:57,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:50:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:50:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:50:57,846 INFO L87 Difference]: Start difference. First operand 853 states and 1287 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2021-11-12 22:50:59,886 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 [] [2021-11-12 22:51:03,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:09,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:12,432 INFO L93 Difference]: Finished difference Result 2002 states and 3019 transitions. [2021-11-12 22:51:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:51:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-12 22:51:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:12,449 INFO L225 Difference]: With dead ends: 2002 [2021-11-12 22:51:12,449 INFO L226 Difference]: Without dead ends: 1159 [2021-11-12 22:51:12,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 412 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:12,453 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 80 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14083.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14456.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:12,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 574 Invalid, 207 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [19 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 14456.85ms Time] [2021-11-12 22:51:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-12 22:51:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1003. [2021-11-12 22:51:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.5419161676646707) internal successors, (1545), 1002 states have internal predecessors, (1545), 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) [2021-11-12 22:51:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1545 transitions. [2021-11-12 22:51:12,516 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1545 transitions. Word has length 210 [2021-11-12 22:51:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1545 transitions. [2021-11-12 22:51:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2021-11-12 22:51:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1545 transitions. [2021-11-12 22:51:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 22:51:12,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:12,524 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 22:51:12,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:12,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:12,741 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:12,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash 95758120, now seen corresponding path program 1 times [2021-11-12 22:51:12,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:12,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377704778] [2021-11-12 22:51:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:12,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:12,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:12,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:51:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:51:13,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:13,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:13,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:14,225 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:51:14,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:51:16,690 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:51:16,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:51:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:51:16,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:51:17,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:17,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377704778] [2021-11-12 22:51:17,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377704778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:17,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:17,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:51:17,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468450764] [2021-11-12 22:51:17,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:17,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:17,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:17,624 INFO L87 Difference]: Start difference. First operand 1003 states and 1545 transitions. Second operand has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 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) [2021-11-12 22:51:19,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:27,203 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:31,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:32,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:37,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:38,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:47,832 INFO L93 Difference]: Finished difference Result 3404 states and 5227 transitions. [2021-11-12 22:51:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:51:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-12 22:51:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:47,850 INFO L225 Difference]: With dead ends: 3404 [2021-11-12 22:51:47,850 INFO L226 Difference]: Without dead ends: 2411 [2021-11-12 22:51:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:51:47,853 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 209 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29234.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.01ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30015.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:47,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 570 Invalid, 623 Unknown, 0 Unchecked, 7.01ms Time], IncrementalHoareTripleChecker [71 Valid, 551 Invalid, 1 Unknown, 0 Unchecked, 30015.46ms Time] [2021-11-12 22:51:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-11-12 22:51:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1282. [2021-11-12 22:51:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.604215456674473) internal successors, (2055), 1281 states have internal predecessors, (2055), 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) [2021-11-12 22:51:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2055 transitions. [2021-11-12 22:51:47,949 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2055 transitions. Word has length 210 [2021-11-12 22:51:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:47,949 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 2055 transitions. [2021-11-12 22:51:47,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.166666666666668) internal successors, (181), 6 states have internal predecessors, (181), 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) [2021-11-12 22:51:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2055 transitions. [2021-11-12 22:51:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 22:51:47,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:47,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-12 22:51:47,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:48,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:48,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -149215637, now seen corresponding path program 1 times [2021-11-12 22:51:48,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:48,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879982364] [2021-11-12 22:51:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:48,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:48,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:48,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:51:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:51:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:51:49,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:49,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:49,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:49,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:49,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:51:49,429 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:51:49,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:51:51,440 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:51:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:51:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:51:51,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-12 22:51:52,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:52,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879982364] [2021-11-12 22:51:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879982364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:52,296 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:52,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:51:52,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507049317] [2021-11-12 22:51:52,297 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:51:52,298 INFO L87 Difference]: Start difference. First operand 1282 states and 2055 transitions. Second operand has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 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) [2021-11-12 22:51:54,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:03,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:07,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:08,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:14,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:21,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:23,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:25,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:27,813 INFO L93 Difference]: Finished difference Result 3934 states and 6207 transitions. [2021-11-12 22:52:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:27,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 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 211 [2021-11-12 22:52:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:27,830 INFO L225 Difference]: With dead ends: 3934 [2021-11-12 22:52:27,831 INFO L226 Difference]: Without dead ends: 2662 [2021-11-12 22:52:27,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:52:27,834 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 202 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34573.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35333.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:27,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 574 Invalid, 614 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [72 Valid, 540 Invalid, 2 Unknown, 0 Unchecked, 35333.86ms Time] [2021-11-12 22:52:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-11-12 22:52:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1562. [2021-11-12 22:52:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.6483023702754644) internal successors, (2573), 1561 states have internal predecessors, (2573), 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) [2021-11-12 22:52:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2573 transitions. [2021-11-12 22:52:27,925 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2573 transitions. Word has length 211 [2021-11-12 22:52:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:27,925 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 2573 transitions. [2021-11-12 22:52:27,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.5) internal successors, (183), 6 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) [2021-11-12 22:52:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2573 transitions. [2021-11-12 22:52:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-12 22:52:27,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:27,932 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 22:52:27,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-12 22:52:28,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:28,150 INFO L85 PathProgramCache]: Analyzing trace with hash -299491700, now seen corresponding path program 1 times [2021-11-12 22:52:28,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:28,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986521816] [2021-11-12 22:52:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:28,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:28,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:28,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:28,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:52:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:29,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:29,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:52:29,315 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:52:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:52:30,813 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:52:30,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:52:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:52:31,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:52:31,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:31,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986521816] [2021-11-12 22:52:31,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986521816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:31,678 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:31,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:52:31,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485921994] [2021-11-12 22:52:31,679 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:31,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:52:31,680 INFO L87 Difference]: Start difference. First operand 1562 states and 2573 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-12 22:52:33,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:35,720 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:44,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:45,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:58,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:02,710 INFO L93 Difference]: Finished difference Result 4592 states and 7463 transitions. [2021-11-12 22:53:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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 240 [2021-11-12 22:53:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:02,729 INFO L225 Difference]: With dead ends: 4592 [2021-11-12 22:53:02,729 INFO L226 Difference]: Without dead ends: 3040 [2021-11-12 22:53:02,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:02,732 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 195 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30143.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30851.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:02,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 615 Invalid, 580 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [55 Valid, 523 Invalid, 2 Unknown, 0 Unchecked, 30851.03ms Time] [2021-11-12 22:53:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-11-12 22:53:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 1978. [2021-11-12 22:53:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.682346990389479) internal successors, (3326), 1977 states have internal predecessors, (3326), 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) [2021-11-12 22:53:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3326 transitions. [2021-11-12 22:53:02,846 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3326 transitions. Word has length 240 [2021-11-12 22:53:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:02,846 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3326 transitions. [2021-11-12 22:53:02,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 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) [2021-11-12 22:53:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3326 transitions. [2021-11-12 22:53:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-12 22:53:02,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:02,854 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:02,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:03,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:03,070 INFO L85 PathProgramCache]: Analyzing trace with hash -961340692, now seen corresponding path program 1 times [2021-11-12 22:53:03,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:03,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123001024] [2021-11-12 22:53:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:03,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:03,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:53:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:03,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:03,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:03,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:03,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:04,279 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:53:04,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:53:06,051 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:53:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:53:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:53:06,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:53:07,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:07,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123001024] [2021-11-12 22:53:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123001024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:07,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:07,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:53:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524405166] [2021-11-12 22:53:07,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:07,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:07,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:07,023 INFO L87 Difference]: Start difference. First operand 1978 states and 3326 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-11-12 22:53:09,049 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 [] [2021-11-12 22:53:11,057 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:12,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:19,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:29,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:30,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:37,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:38,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:41,323 INFO L93 Difference]: Finished difference Result 5302 states and 8686 transitions. [2021-11-12 22:53:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:53:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-12 22:53:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:41,343 INFO L225 Difference]: With dead ends: 5302 [2021-11-12 22:53:41,344 INFO L226 Difference]: Without dead ends: 3334 [2021-11-12 22:53:41,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:53:41,347 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 203 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33371.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.70ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34100.54ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:41,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 548 Invalid, 604 Unknown, 0 Unchecked, 4.70ms Time], IncrementalHoareTripleChecker [70 Valid, 532 Invalid, 2 Unknown, 0 Unchecked, 34100.54ms Time] [2021-11-12 22:53:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-11-12 22:53:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2237. [2021-11-12 22:53:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 1.6940966010733454) internal successors, (3788), 2236 states have internal predecessors, (3788), 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) [2021-11-12 22:53:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3788 transitions. [2021-11-12 22:53:41,472 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3788 transitions. Word has length 244 [2021-11-12 22:53:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:41,473 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 3788 transitions. [2021-11-12 22:53:41,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-11-12 22:53:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3788 transitions. [2021-11-12 22:53:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-12 22:53:41,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:41,479 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:41,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:41,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:41,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash 434387151, now seen corresponding path program 1 times [2021-11-12 22:53:41,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:41,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642581351] [2021-11-12 22:53:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:41,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:41,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:41,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:41,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:53:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:42,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:42,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:42,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:53:42,968 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:53:42,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:53:44,819 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:53:44,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:53:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:53:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-12 22:53:45,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:45,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642581351] [2021-11-12 22:53:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642581351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:45,773 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:53:45,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320398997] [2021-11-12 22:53:45,774 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:45,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:53:45,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:53:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:53:45,775 INFO L87 Difference]: Start difference. First operand 2237 states and 3788 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 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) [2021-11-12 22:53:47,807 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 [] [2021-11-12 22:53:49,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:04,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:08,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:21,055 INFO L93 Difference]: Finished difference Result 5528 states and 9088 transitions. [2021-11-12 22:54:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:54:21,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 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 245 [2021-11-12 22:54:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:21,069 INFO L225 Difference]: With dead ends: 5528 [2021-11-12 22:54:21,069 INFO L226 Difference]: Without dead ends: 3301 [2021-11-12 22:54:21,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:54:21,073 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 199 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34194.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.72ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35054.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:21,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 733 Invalid, 763 Unknown, 0 Unchecked, 5.72ms Time], IncrementalHoareTripleChecker [70 Valid, 692 Invalid, 1 Unknown, 0 Unchecked, 35054.03ms Time] [2021-11-12 22:54:21,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2021-11-12 22:54:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2237. [2021-11-12 22:54:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 1.68783542039356) internal successors, (3774), 2236 states have internal predecessors, (3774), 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) [2021-11-12 22:54:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 3774 transitions. [2021-11-12 22:54:21,197 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 3774 transitions. Word has length 245 [2021-11-12 22:54:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:21,198 INFO L470 AbstractCegarLoop]: Abstraction has 2237 states and 3774 transitions. [2021-11-12 22:54:21,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 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) [2021-11-12 22:54:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 3774 transitions. [2021-11-12 22:54:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-12 22:54:21,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:21,204 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:21,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:21,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:21,406 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1190000932, now seen corresponding path program 1 times [2021-11-12 22:54:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:21,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417230630] [2021-11-12 22:54:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:21,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:21,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:21,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:54:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:22,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:54:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:54:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:54:23,018 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-12 22:54:23,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-12 22:54:23,712 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:54:23,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-12 22:54:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-12 22:54:24,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-12 22:54:24,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:24,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417230630] [2021-11-12 22:54:24,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417230630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:24,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:54:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900032238] [2021-11-12 22:54:24,660 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:54:24,661 INFO L87 Difference]: Start difference. First operand 2237 states and 3774 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:54:26,696 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 [] [2021-11-12 22:54:28,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:30,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:43,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:50,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:52,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:01,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:04,828 INFO L93 Difference]: Finished difference Result 5808 states and 9544 transitions. [2021-11-12 22:55:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:55:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-12 22:55:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:04,844 INFO L225 Difference]: With dead ends: 5808 [2021-11-12 22:55:04,844 INFO L226 Difference]: Without dead ends: 3581 [2021-11-12 22:55:04,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:04,847 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 241 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 70 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39039.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39924.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:04,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 714 Invalid, 771 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [70 Valid, 696 Invalid, 5 Unknown, 0 Unchecked, 39924.58ms Time] [2021-11-12 22:55:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-11-12 22:55:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 2349. [2021-11-12 22:55:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 1.6707836456558773) internal successors, (3923), 2348 states have internal predecessors, (3923), 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) [2021-11-12 22:55:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3923 transitions. [2021-11-12 22:55:04,988 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3923 transitions. Word has length 253 [2021-11-12 22:55:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:04,989 INFO L470 AbstractCegarLoop]: Abstraction has 2349 states and 3923 transitions. [2021-11-12 22:55:04,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:55:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3923 transitions. [2021-11-12 22:55:04,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-12 22:55:04,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:04,995 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:05,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:05,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:05,220 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2046774459, now seen corresponding path program 1 times [2021-11-12 22:55:05,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:05,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172097263] [2021-11-12 22:55:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:05,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:05,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:05,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:05,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:55:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:06,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:06,349 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:55:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-12 22:55:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:06,709 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:55:06,709 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 [2021-11-12 22:55:08,746 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:55:08,746 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 [2021-11-12 22:55:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 22:55:08,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 22:55:09,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:09,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172097263] [2021-11-12 22:55:09,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172097263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:09,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:09,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:09,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509715714] [2021-11-12 22:55:09,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:09,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:09,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:09,505 INFO L87 Difference]: Start difference. First operand 2349 states and 3923 transitions. Second operand has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 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) [2021-11-12 22:55:11,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:13,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:16,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:23,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:24,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:29,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:34,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:44,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:46,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:49,184 INFO L93 Difference]: Finished difference Result 6877 states and 11142 transitions. [2021-11-12 22:55:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 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 254 [2021-11-12 22:55:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:49,211 INFO L225 Difference]: With dead ends: 6877 [2021-11-12 22:55:49,211 INFO L226 Difference]: Without dead ends: 4538 [2021-11-12 22:55:49,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:55:49,214 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 301 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38444.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39362.69ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:49,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 763 Invalid, 821 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [79 Valid, 739 Invalid, 3 Unknown, 0 Unchecked, 39362.69ms Time] [2021-11-12 22:55:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-11-12 22:55:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2842. [2021-11-12 22:55:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 1.6860260471664907) internal successors, (4790), 2841 states have internal predecessors, (4790), 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) [2021-11-12 22:55:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 4790 transitions. [2021-11-12 22:55:49,423 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 4790 transitions. Word has length 254 [2021-11-12 22:55:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:49,423 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 4790 transitions. [2021-11-12 22:55:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 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) [2021-11-12 22:55:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 4790 transitions. [2021-11-12 22:55:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-12 22:55:49,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:49,447 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-12 22:55:49,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:49,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:49,647 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1562207625, now seen corresponding path program 1 times [2021-11-12 22:55:49,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:49,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483399263] [2021-11-12 22:55:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:49,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:49,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:49,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:55:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:50,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:50,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:55:50,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:50,763 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:55:50,764 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 [2021-11-12 22:55:50,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:50,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:50,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:55:51,142 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:55:51,143 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 [2021-11-12 22:55:53,316 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:55:53,317 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 [2021-11-12 22:55:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 22:55:53,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-12 22:55:54,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:54,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483399263] [2021-11-12 22:55:54,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483399263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:54,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:54,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:55:54,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362793737] [2021-11-12 22:55:54,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:54,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:54,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:55:54,050 INFO L87 Difference]: Start difference. First operand 2842 states and 4790 transitions. Second operand has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 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) [2021-11-12 22:55:56,070 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 [] [2021-11-12 22:55:58,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:00,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:07,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:08,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:11,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:12,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:21,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:22,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:29,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:37,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:38,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:42,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:50,257 INFO L93 Difference]: Finished difference Result 7339 states and 11977 transitions. [2021-11-12 22:56:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:56:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 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 256 [2021-11-12 22:56:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:50,267 INFO L225 Difference]: With dead ends: 7339 [2021-11-12 22:56:50,267 INFO L226 Difference]: Without dead ends: 4467 [2021-11-12 22:56:50,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:50,270 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 296 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 81 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54436.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.66ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55820.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:50,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1010 Invalid, 1158 Unknown, 0 Unchecked, 6.66ms Time], IncrementalHoareTripleChecker [81 Valid, 1074 Invalid, 3 Unknown, 0 Unchecked, 55820.32ms Time] [2021-11-12 22:56:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2021-11-12 22:56:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 2856. [2021-11-12 22:56:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 1.6851138353765325) internal successors, (4811), 2855 states have internal predecessors, (4811), 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) [2021-11-12 22:56:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4811 transitions. [2021-11-12 22:56:50,543 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4811 transitions. Word has length 256 [2021-11-12 22:56:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:50,543 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 4811 transitions. [2021-11-12 22:56:50,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 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) [2021-11-12 22:56:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4811 transitions. [2021-11-12 22:56:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-12 22:56:50,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:50,565 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:50,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 22:56:50,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:50,782 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:50,783 INFO L85 PathProgramCache]: Analyzing trace with hash -853098811, now seen corresponding path program 1 times [2021-11-12 22:56:50,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:50,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52201501] [2021-11-12 22:56:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:50,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:50,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:50,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:50,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:56:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:51,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:51,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:56:51,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:51,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:52,058 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:56:52,058 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 [2021-11-12 22:56:52,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:56:52,388 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:56:52,389 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 [2021-11-12 22:56:53,040 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:56:53,040 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 [2021-11-12 22:56:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-12 22:56:53,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-12 22:56:53,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:53,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52201501] [2021-11-12 22:56:53,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52201501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:53,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:53,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:56:53,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354898659] [2021-11-12 22:56:53,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:53,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:56:53,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:56:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:56:53,808 INFO L87 Difference]: Start difference. First operand 2856 states and 4811 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 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) [2021-11-12 22:56:55,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:57,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:05,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:08,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:14,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:15,840 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:16,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:22,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:26,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:36,545 INFO L93 Difference]: Finished difference Result 7287 states and 11905 transitions. [2021-11-12 22:57:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:57:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 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 282 [2021-11-12 22:57:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:36,556 INFO L225 Difference]: With dead ends: 7287 [2021-11-12 22:57:36,556 INFO L226 Difference]: Without dead ends: 4441 [2021-11-12 22:57:36,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 556 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:36,559 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 331 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41282.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42328.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:36,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 704 Invalid, 791 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [80 Valid, 709 Invalid, 2 Unknown, 0 Unchecked, 42328.77ms Time] [2021-11-12 22:57:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-11-12 22:57:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 2856. [2021-11-12 22:57:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 1.6665499124343257) internal successors, (4758), 2855 states have internal predecessors, (4758), 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) [2021-11-12 22:57:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4758 transitions. [2021-11-12 22:57:36,737 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4758 transitions. Word has length 282 [2021-11-12 22:57:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:36,737 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 4758 transitions. [2021-11-12 22:57:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 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) [2021-11-12 22:57:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4758 transitions. [2021-11-12 22:57:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-12 22:57:36,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:36,745 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:36,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:36,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:36,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1787837157, now seen corresponding path program 1 times [2021-11-12 22:57:36,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:36,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588449106] [2021-11-12 22:57:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:36,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:36,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:36,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:37,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:57:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:41,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:57:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:41,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:57:41,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:41,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:41,611 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:57:41,611 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 [2021-11-12 22:57:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:41,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:41,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:57:42,082 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:57:42,083 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 [2021-11-12 22:57:42,505 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:57:42,506 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 [2021-11-12 22:57:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-12 22:57:42,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-12 22:57:43,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:43,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588449106] [2021-11-12 22:57:43,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588449106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:43,505 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:43,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:57:43,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671570665] [2021-11-12 22:57:43,506 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:43,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:57:43,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:57:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:57:43,507 INFO L87 Difference]: Start difference. First operand 2856 states and 4758 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-11-12 22:57:45,540 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 [] [2021-11-12 22:57:47,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:49,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:00,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:03,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:07,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:12,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:14,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:15,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:17,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:23,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:36,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:38,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:44,602 INFO L93 Difference]: Finished difference Result 7267 states and 11766 transitions. [2021-11-12 22:58:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:58:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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 310 [2021-11-12 22:58:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:44,615 INFO L225 Difference]: With dead ends: 7267 [2021-11-12 22:58:44,615 INFO L226 Difference]: Without dead ends: 4421 [2021-11-12 22:58:44,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:58:44,619 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 339 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 76 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59195.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60678.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:44,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 1020 Invalid, 1132 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [76 Valid, 1053 Invalid, 3 Unknown, 0 Unchecked, 60678.43ms Time] [2021-11-12 22:58:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-12 22:58:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 2856. [2021-11-12 22:58:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 1.6455341506129597) internal successors, (4698), 2855 states have internal predecessors, (4698), 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) [2021-11-12 22:58:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4698 transitions. [2021-11-12 22:58:44,829 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4698 transitions. Word has length 310 [2021-11-12 22:58:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:44,830 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 4698 transitions. [2021-11-12 22:58:44,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 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) [2021-11-12 22:58:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4698 transitions. [2021-11-12 22:58:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-12 22:58:44,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:44,840 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:44,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:45,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:45,053 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2098964123, now seen corresponding path program 1 times [2021-11-12 22:58:45,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:45,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086317579] [2021-11-12 22:58:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:45,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:45,057 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:45,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:58:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:58:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:48,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:58:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:48,478 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:58:48,478 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 [2021-11-12 22:58:48,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:48,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:48,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:58:48,941 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:58:48,942 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 [2021-11-12 22:58:49,524 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:58:49,525 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 [2021-11-12 22:58:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 22:58:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 22:58:50,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:50,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086317579] [2021-11-12 22:58:50,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086317579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:50,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:50,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:58:50,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084713061] [2021-11-12 22:58:50,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:58:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:58:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:58:50,677 INFO L87 Difference]: Start difference. First operand 2856 states and 4698 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 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) [2021-11-12 22:58:52,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:03,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:05,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:08,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:13,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:15,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:23,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:26,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:28,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:41,216 INFO L93 Difference]: Finished difference Result 7561 states and 12131 transitions. [2021-11-12 22:59:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:59:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 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 310 [2021-11-12 22:59:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:41,232 INFO L225 Difference]: With dead ends: 7561 [2021-11-12 22:59:41,232 INFO L226 Difference]: Without dead ends: 4715 [2021-11-12 22:59:41,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 612 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:59:41,236 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 343 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48717.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.70ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50068.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:41,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 813 Invalid, 877 Unknown, 0 Unchecked, 6.70ms Time], IncrementalHoareTripleChecker [74 Valid, 801 Invalid, 2 Unknown, 0 Unchecked, 50068.34ms Time] [2021-11-12 22:59:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-12 22:59:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 2928. [2021-11-12 22:59:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.6235052955244278) internal successors, (4752), 2927 states have internal predecessors, (4752), 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) [2021-11-12 22:59:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4752 transitions. [2021-11-12 22:59:41,478 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4752 transitions. Word has length 310 [2021-11-12 22:59:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:41,478 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4752 transitions. [2021-11-12 22:59:41,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 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) [2021-11-12 22:59:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4752 transitions. [2021-11-12 22:59:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-12 22:59:41,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:41,486 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:41,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:41,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:41,710 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash -242249437, now seen corresponding path program 1 times [2021-11-12 22:59:41,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:41,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428228397] [2021-11-12 22:59:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:41,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:41,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:41,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:41,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:59:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:59:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:59:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:44,125 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 22:59:44,125 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 [2021-11-12 22:59:44,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 22:59:44,492 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 22:59:44,492 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 [2021-11-12 22:59:44,957 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 22:59:44,957 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 [2021-11-12 22:59:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 22:59:45,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 22:59:45,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:45,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428228397] [2021-11-12 22:59:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428228397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:45,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:45,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 22:59:45,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803709007] [2021-11-12 22:59:45,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:59:45,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:59:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:59:45,867 INFO L87 Difference]: Start difference. First operand 2928 states and 4752 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 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) [2021-11-12 22:59:47,908 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 [] [2021-11-12 22:59:49,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:51,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:57,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:02,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:04,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:06,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:13,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:18,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:20,919 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:24,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:30,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:35,351 INFO L93 Difference]: Finished difference Result 7633 states and 12118 transitions. [2021-11-12 23:00:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:00:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 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 [2021-11-12 23:00:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:35,357 INFO L225 Difference]: With dead ends: 7633 [2021-11-12 23:00:35,357 INFO L226 Difference]: Without dead ends: 4715 [2021-11-12 23:00:35,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 614 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:00:35,359 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 338 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47882.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.80ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49069.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:35,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 833 Invalid, 902 Unknown, 0 Unchecked, 5.80ms Time], IncrementalHoareTripleChecker [74 Valid, 826 Invalid, 2 Unknown, 0 Unchecked, 49069.54ms Time] [2021-11-12 23:00:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-12 23:00:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 2934. [2021-11-12 23:00:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2933 states have (on average 1.6058643027616775) internal successors, (4710), 2933 states have internal predecessors, (4710), 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) [2021-11-12 23:00:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4710 transitions. [2021-11-12 23:00:35,549 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4710 transitions. Word has length 311 [2021-11-12 23:00:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4710 transitions. [2021-11-12 23:00:35,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 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) [2021-11-12 23:00:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4710 transitions. [2021-11-12 23:00:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-12 23:00:35,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:35,573 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:00:35,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 23:00:35,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:35,789 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:35,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1463735958, now seen corresponding path program 1 times [2021-11-12 23:00:35,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:35,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641662069] [2021-11-12 23:00:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:35,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:35,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:35,792 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:35,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:00:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:00:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:38,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:38,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:38,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:00:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:38,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:38,148 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:00:38,148 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 [2021-11-12 23:00:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:38,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:00:38,515 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:00:38,515 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 [2021-11-12 23:00:39,125 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:00:39,125 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 [2021-11-12 23:00:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 23:00:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 23:00:40,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641662069] [2021-11-12 23:00:40,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641662069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:40,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:40,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:00:40,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778345707] [2021-11-12 23:00:40,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:40,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:00:40,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:00:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:00:40,179 INFO L87 Difference]: Start difference. First operand 2934 states and 4710 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-11-12 23:00:42,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:49,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:55,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:56,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:58,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:00:59,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:06,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:11,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:20,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:24,047 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 [] [2021-11-12 23:01:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:27,025 INFO L93 Difference]: Finished difference Result 7759 states and 12186 transitions. [2021-11-12 23:01:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:01:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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 312 [2021-11-12 23:01:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:27,032 INFO L225 Difference]: With dead ends: 7759 [2021-11-12 23:01:27,032 INFO L226 Difference]: Without dead ends: 4835 [2021-11-12 23:01:27,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:01:27,035 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 333 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 73 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45205.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46380.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:27,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 827 Invalid, 897 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [73 Valid, 820 Invalid, 4 Unknown, 0 Unchecked, 46380.88ms Time] [2021-11-12 23:01:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-11-12 23:01:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3032. [2021-11-12 23:01:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 1.58231606730452) internal successors, (4796), 3031 states have internal predecessors, (4796), 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) [2021-11-12 23:01:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4796 transitions. [2021-11-12 23:01:27,310 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4796 transitions. Word has length 312 [2021-11-12 23:01:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:27,311 INFO L470 AbstractCegarLoop]: Abstraction has 3032 states and 4796 transitions. [2021-11-12 23:01:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-11-12 23:01:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4796 transitions. [2021-11-12 23:01:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-12 23:01:27,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:27,333 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:01:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:27,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:01:27,549 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:01:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash 674787912, now seen corresponding path program 1 times [2021-11-12 23:01:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:27,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785174978] [2021-11-12 23:01:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:01:27,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:27,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:27,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:27,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:01:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:01:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:01:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:30,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:30,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:01:30,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:30,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:30,776 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:01:30,776 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 [2021-11-12 23:01:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:30,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:01:31,155 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:01:31,155 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 [2021-11-12 23:01:31,797 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:01:31,798 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 [2021-11-12 23:01:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 23:01:32,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:01:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 23:01:32,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:01:32,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785174978] [2021-11-12 23:01:32,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785174978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:01:32,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:01:32,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:01:32,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210518675] [2021-11-12 23:01:32,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:01:32,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:01:32,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:01:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:01:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:01:32,843 INFO L87 Difference]: Start difference. First operand 3032 states and 4796 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 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) [2021-11-12 23:01:34,875 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 [] [2021-11-12 23:01:36,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:45,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:48,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:55,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:57,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:06,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:15,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:18,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:02:20,215 INFO L93 Difference]: Finished difference Result 7481 states and 11615 transitions. [2021-11-12 23:02:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:02:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 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 313 [2021-11-12 23:02:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:02:20,220 INFO L225 Difference]: With dead ends: 7481 [2021-11-12 23:02:20,220 INFO L226 Difference]: Without dead ends: 4459 [2021-11-12 23:02:20,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 618 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:02:20,223 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 315 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 71 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45786.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46893.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:02:20,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 735 Invalid, 859 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [71 Valid, 785 Invalid, 3 Unknown, 0 Unchecked, 46893.89ms Time] [2021-11-12 23:02:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2021-11-12 23:02:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 3032. [2021-11-12 23:02:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 1.5625206202573407) internal successors, (4736), 3031 states have internal predecessors, (4736), 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) [2021-11-12 23:02:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4736 transitions. [2021-11-12 23:02:20,448 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4736 transitions. Word has length 313 [2021-11-12 23:02:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:02:20,449 INFO L470 AbstractCegarLoop]: Abstraction has 3032 states and 4736 transitions. [2021-11-12 23:02:20,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 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) [2021-11-12 23:02:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4736 transitions. [2021-11-12 23:02:20,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-12 23:02:20,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:02:20,456 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:02:20,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:02:20,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:02:20,681 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:02:20,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:02:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash -453285852, now seen corresponding path program 1 times [2021-11-12 23:02:20,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:02:20,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762198308] [2021-11-12 23:02:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:02:20,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:02:20,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:02:20,685 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:02:20,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:02:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:02:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:02:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:02:22,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:22,566 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:02:22,566 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 [2021-11-12 23:02:22,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:22,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:02:23,087 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-12 23:02:23,087 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 [2021-11-12 23:02:25,408 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-12 23:02:25,408 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 [2021-11-12 23:02:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-12 23:02:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-12 23:02:26,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:26,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762198308] [2021-11-12 23:02:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762198308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:02:26,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:02:26,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-12 23:02:26,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989062596] [2021-11-12 23:02:26,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:02:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:02:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:02:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:02:26,571 INFO L87 Difference]: Start difference. First operand 3032 states and 4736 transitions. Second operand has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 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) [2021-11-12 23:02:28,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:31,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:40,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:41,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:42,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:44,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:49,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:51,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:52,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:58,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:05,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:06,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:09,313 INFO L93 Difference]: Finished difference Result 7857 states and 12066 transitions. [2021-11-12 23:03:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:03:09,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 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 323 [2021-11-12 23:03:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:09,322 INFO L225 Difference]: With dead ends: 7857 [2021-11-12 23:03:09,322 INFO L226 Difference]: Without dead ends: 4835 [2021-11-12 23:03:09,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 638 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:03:09,326 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 263 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41193.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.57ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42281.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:09,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 730 Invalid, 842 Unknown, 0 Unchecked, 4.57ms Time], IncrementalHoareTripleChecker [67 Valid, 773 Invalid, 2 Unknown, 0 Unchecked, 42281.24ms Time] [2021-11-12 23:03:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-11-12 23:03:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 3379. [2021-11-12 23:03:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 1.5595026642984013) internal successors, (5268), 3378 states have internal predecessors, (5268), 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) [2021-11-12 23:03:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 5268 transitions. [2021-11-12 23:03:09,551 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 5268 transitions. Word has length 323 [2021-11-12 23:03:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 3379 states and 5268 transitions. [2021-11-12 23:03:09,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.285714285714285) internal successors, (212), 7 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) [2021-11-12 23:03:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 5268 transitions. [2021-11-12 23:03:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-12 23:03:09,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:09,559 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:09,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:09,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:09,773 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 527668962, now seen corresponding path program 1 times [2021-11-12 23:03:09,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:09,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397263490] [2021-11-12 23:03:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:09,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:09,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:09,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe06a7f0-e211-449e-b42e-4e7c6f007372/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:03:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:11,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:03:11,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:11,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:11,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:11,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:11,718 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-12 23:03:11,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-12 23:03:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:12,769 INFO L354 Elim1Store]: treesize reduction 1702, result has 5.5 percent of original size [2021-11-12 23:03:12,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 103 treesize of output 132 [2021-11-12 23:03:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:03:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:03:14,574 INFO L354 Elim1Store]: treesize reduction 2746, result has 4.7 percent of original size [2021-11-12 23:03:14,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 81 case distinctions, treesize of input 140 treesize of output 181 [2021-11-12 23:03:15,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2021-11-12 23:03:15,644 INFO L354 Elim1Store]: treesize reduction 1440, result has 0.1 percent of original size [2021-11-12 23:03:15,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 34091303007 treesize of output 33017561119