./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/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_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/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 64bit --witnessprinter.graph.data.programhash 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:36,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:36,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:36,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:36,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:36,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:36,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:36,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:36,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:36,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:36,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:36,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:36,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:36,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:36,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:36,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:36,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:36,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:36,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:36,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:36,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:36,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:36,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:36,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:36,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:36,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:36,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:36,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:36,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:36,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:36,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:36,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:36,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:36,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:36,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:36,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:36,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:36,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:36,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:36,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:36,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:36,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:27:36,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:36,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:36,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:36,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:36,734 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:36,735 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:36,735 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:36,735 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:27:36,736 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:36,736 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:36,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:27:36,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:27:36,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:36,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:27:36,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:27:36,747 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:27:36,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:36,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:27:36,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:36,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:36,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:36,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:36,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:36,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:36,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:36,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:36,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:36,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:36,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:36,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:36,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:36,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:36,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:27:36,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:27:36,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:36,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:36,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:36,755 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 [2021-11-12 23:27:37,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:37,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:37,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:37,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:37,158 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:37,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-12 23:27:37,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/c94e8ba9b/0627f3b28e354fb2a752e48e7ceb4380/FLAGb069bdb16 [2021-11-12 23:27:38,456 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:38,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-12 23:27:38,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/c94e8ba9b/0627f3b28e354fb2a752e48e7ceb4380/FLAGb069bdb16 [2021-11-12 23:27:38,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/c94e8ba9b/0627f3b28e354fb2a752e48e7ceb4380 [2021-11-12 23:27:38,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:38,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:38,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:38,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:38,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:38,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:38" (1/1) ... [2021-11-12 23:27:38,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d56d35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:38, skipping insertion in model container [2021-11-12 23:27:38,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:38" (1/1) ... [2021-11-12 23:27:38,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:38,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:41,641 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 23:27:41,802 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-12 23:27:42,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:42,114 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 23:27:42,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@177b9295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:42, skipping insertion in model container [2021-11-12 23:27:42,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:42,116 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:27:42,118 INFO L158 Benchmark]: Toolchain (without parser) took 3343.97ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 55.6MB in the beginning and 45.5MB in the end (delta: 10.0MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. [2021-11-12 23:27:42,119 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 64.2MB in the beginning and 64.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:27:42,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3340.99ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 55.3MB in the beginning and 45.5MB in the end (delta: 9.8MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. [2021-11-12 23:27:42,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 83.9MB. Free memory was 64.2MB in the beginning and 64.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3340.99ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 55.3MB in the beginning and 45.5MB in the end (delta: 9.8MB). Peak memory consumption was 42.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4955]: 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/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_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/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 64bit --witnessprinter.graph.data.programhash 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:45,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:45,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:45,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:45,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:45,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:45,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:45,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:45,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:45,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:45,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:45,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:45,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:45,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:45,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:45,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:45,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:45,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:45,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:45,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:45,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:45,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:45,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:45,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:45,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:45,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:45,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:45,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:45,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:45,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:45,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:45,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:45,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:45,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:45,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:45,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:45,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:45,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:45,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:45,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:45,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:45,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:27:45,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:45,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:45,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:45,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:45,268 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:45,268 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:45,268 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:45,269 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:45,269 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:45,269 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:45,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:45,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:45,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:45,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:45,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:45,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:45,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:27:45,275 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:27:45,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:45,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:45,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:45,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:45,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:27:45,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:45,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:45,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:45,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:45,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:45,278 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:27:45,278 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:45,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:45,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:45,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:45,280 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 [2021-11-12 23:27:45,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:45,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:45,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:45,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:45,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:45,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-12 23:27:45,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/14d2ad4b1/dda32368626d4d28844f0b4153354cb1/FLAGc8069d46c [2021-11-12 23:27:47,121 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:47,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-12 23:27:47,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/14d2ad4b1/dda32368626d4d28844f0b4153354cb1/FLAGc8069d46c [2021-11-12 23:27:47,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/data/14d2ad4b1/dda32368626d4d28844f0b4153354cb1 [2021-11-12 23:27:47,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:47,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:47,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:47,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:47,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:47,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:47" (1/1) ... [2021-11-12 23:27:47,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b44564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:47, skipping insertion in model container [2021-11-12 23:27:47,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:47" (1/1) ... [2021-11-12 23:27:47,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:47,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:50,247 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-12 23:27:50,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:50,536 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:27:50,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:51,056 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-12 23:27:51,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:51,111 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:27:51,628 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_4a6f21ad-0726-4980-ab36-e76d25c98d14/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-12 23:27:51,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:51,874 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:27:51,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51 WrapperNode [2021-11-12 23:27:51,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:51,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:51,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:27:51,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:27:51,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:52,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:27:52,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:27:52,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:27:52,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:27:52,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:27:52,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:27:52,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:27:52,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (1/1) ... [2021-11-12 23:27:52,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:52,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:27:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:27:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-12 23:27:52,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-12 23:27:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:27:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-12 23:27:52,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-12 23:27:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:27:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:27:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:27:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:27:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:27:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:27:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:27:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure msb_stop [2021-11-12 23:27:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_stop [2021-11-12 23:27:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_pba [2021-11-12 23:27:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_pba [2021-11-12 23:27:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-12 23:27:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-12 23:27:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:27:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:27:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure blk_fetch_request [2021-11-12 23:27:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_fetch_request [2021-11-12 23:27:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-12 23:27:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-12 23:27:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-12 23:27:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-12 23:27:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:27:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:27:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:27:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:27:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure msb_switch_to_parallel [2021-11-12 23:27:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_switch_to_parallel [2021-11-12 23:27:52,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:27:52,759 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:27:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:27:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:27:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure msb_validate_used_block_bitmap [2021-11-12 23:27:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_validate_used_block_bitmap [2021-11-12 23:27:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-12 23:27:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-12 23:27:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure msb_verify_block [2021-11-12 23:27:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_verify_block [2021-11-12 23:27:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:27:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:27:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_2 [2021-11-12 23:27:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_2 [2021-11-12 23:27:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_msb_disk_lock [2021-11-12 23:27:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_msb_disk_lock [2021-11-12 23:27:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:27:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_write [2021-11-12 23:27:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_write [2021-11-12 23:27:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:27:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-12 23:27:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-12 23:27:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_set_drvdata [2021-11-12 23:27:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_set_drvdata [2021-11-12 23:27:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure __blk_end_request [2021-11-12 23:27:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __blk_end_request [2021-11-12 23:27:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:27:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-12 23:27:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-12 23:27:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure msb_invalidate_reg_window [2021-11-12 23:27:52,771 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_invalidate_reg_window [2021-11-12 23:27:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure msb_io_work [2021-11-12 23:27:52,772 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_io_work [2021-11-12 23:27:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:27:52,772 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:27:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:27:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:27:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:27:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_table [2021-11-12 23:27:52,774 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_table [2021-11-12 23:27:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:27:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:27:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure msb_erase_block [2021-11-12 23:27:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_erase_block [2021-11-12 23:27:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:27:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_get_drvdata [2021-11-12 23:27:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_get_drvdata [2021-11-12 23:27:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:27:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:27:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:27:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:27:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure msb_data_clear [2021-11-12 23:27:52,777 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_data_clear [2021-11-12 23:27:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 23:27:52,778 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 23:27:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-12 23:27:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-12 23:27:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:27:52,779 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:27:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-12 23:27:52,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-12 23:27:52,781 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-12 23:27:52,781 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-12 23:27:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_bad_block_table [2021-11-12 23:27:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_bad_block_table [2021-11-12 23:27:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure msb_update_block [2021-11-12 23:27:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_update_block [2021-11-12 23:27:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_flush [2021-11-12 23:27:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_flush [2021-11-12 23:27:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_next [2021-11-12 23:27:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_next [2021-11-12 23:27:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-12 23:27:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-12 23:27:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_start [2021-11-12 23:27:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_start [2021-11-12 23:27:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure msb_run_state_machine [2021-11-12 23:27:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_run_state_machine [2021-11-12 23:27:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure msb_sg_copy [2021-11-12 23:27:52,786 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_sg_copy [2021-11-12 23:27:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-12 23:27:52,787 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-12 23:27:52,788 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:27:52,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:27:52,791 INFO L130 BoogieDeclarations]: Found specification of procedure find_next_zero_bit [2021-11-12 23:27:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure find_next_zero_bit [2021-11-12 23:27:52,792 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-12 23:27:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-12 23:27:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-12 23:27:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-12 23:27:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_lba [2021-11-12 23:27:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_lba [2021-11-12 23:27:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure msb_reset [2021-11-12 23:27:52,801 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_reset [2021-11-12 23:27:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_2 [2021-11-12 23:27:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_2 [2021-11-12 23:27:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure blk_start_queue [2021-11-12 23:27:52,802 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_start_queue [2021-11-12 23:27:52,802 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:27:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:27:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2021-11-12 23:27:52,803 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2021-11-12 23:27:52,803 INFO L130 BoogieDeclarations]: Found specification of procedure msb_bd_getgeo [2021-11-12 23:27:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_bd_getgeo [2021-11-12 23:27:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure msb_remove [2021-11-12 23:27:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_remove [2021-11-12 23:27:52,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:27:52,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:27:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure sg_next [2021-11-12 23:27:52,805 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_next [2021-11-12 23:27:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_bad [2021-11-12 23:27:52,805 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_bad [2021-11-12 23:27:52,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:27:52,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:27:52,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:27:52,806 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_2 [2021-11-12 23:27:52,806 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_2 [2021-11-12 23:27:52,806 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~TO~C_INT [2021-11-12 23:27:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~X~C_INT~TO~C_INT [2021-11-12 23:27:52,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:27:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:27:52,807 INFO L130 BoogieDeclarations]: Found specification of procedure sg_nents [2021-11-12 23:27:52,807 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_nents [2021-11-12 23:27:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:27:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_page [2021-11-12 23:27:52,808 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_page [2021-11-12 23:27:52,808 INFO L130 BoogieDeclarations]: Found specification of procedure __set_bit [2021-11-12 23:27:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_bit [2021-11-12 23:27:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_stop [2021-11-12 23:27:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_stop [2021-11-12 23:27:52,809 INFO L130 BoogieDeclarations]: Found specification of procedure msb_set_overwrite_flag [2021-11-12 23:27:52,809 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_set_overwrite_flag [2021-11-12 23:27:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure blk_rq_bytes [2021-11-12 23:27:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_rq_bytes [2021-11-12 23:27:52,810 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-12 23:27:52,810 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-12 23:27:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure msb_disk_release [2021-11-12 23:27:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_disk_release [2021-11-12 23:27:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_block_used [2021-11-12 23:27:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_block_used [2021-11-12 23:27:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_discard [2021-11-12 23:27:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_discard [2021-11-12 23:27:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:27:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:27:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure msb_start [2021-11-12 23:27:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_start [2021-11-12 23:27:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-12 23:27:52,813 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-12 23:27:52,813 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-12 23:27:52,814 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-12 23:27:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-12 23:27:52,815 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-12 23:27:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure msb_init_card [2021-11-12 23:27:52,815 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_init_card [2021-11-12 23:27:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-12 23:27:52,816 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-12 23:27:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:27:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:27:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_one [2021-11-12 23:27:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_one [2021-11-12 23:27:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-12 23:27:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-12 23:27:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-12 23:27:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-12 23:27:52,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:27:52,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:27:54,983 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:28:25,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:28:25,273 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:28:25,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:25 BoogieIcfgContainer [2021-11-12 23:28:25,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:28:25,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:28:25,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:28:25,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:28:25,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:27:47" (1/3) ... [2021-11-12 23:28:25,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3779e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:25, skipping insertion in model container [2021-11-12 23:28:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:51" (2/3) ... [2021-11-12 23:28:25,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3779e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:25, skipping insertion in model container [2021-11-12 23:28:25,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:25" (3/3) ... [2021-11-12 23:28:25,291 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-12 23:28:25,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:28:25,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:28:25,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:28:25,382 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 23:28:25,383 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:28:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 1463 states, 1031 states have (on average 1.3773035887487877) internal successors, (1420), 1075 states have internal predecessors, (1420), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-12 23:28:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:28:25,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:25,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:25,467 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2074802797, now seen corresponding path program 1 times [2021-11-12 23:28:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601366069] [2021-11-12 23:28:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:25,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:25,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:25,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:28:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:28:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:28:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:28:29,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:29,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601366069] [2021-11-12 23:28:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601366069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:29,156 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:29,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:28:29,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855106661] [2021-11-12 23:28:29,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:29,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:28:29,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:28:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:28:29,209 INFO L87 Difference]: Start difference. First operand has 1463 states, 1031 states have (on average 1.3773035887487877) internal successors, (1420), 1075 states have internal predecessors, (1420), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:28:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:29,538 INFO L93 Difference]: Finished difference Result 2921 states and 4262 transitions. [2021-11-12 23:28:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:28:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 84 [2021-11-12 23:28:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:29,581 INFO L225 Difference]: With dead ends: 2921 [2021-11-12 23:28:29,582 INFO L226 Difference]: Without dead ends: 1438 [2021-11-12 23:28:29,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:28:29,608 INFO L933 BasicCegarLoop]: 2088 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:29,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 18.40ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:28:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-11-12 23:28:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1438. [2021-11-12 23:28:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1014 states have (on average 1.3629191321499015) internal successors, (1382), 1050 states have internal predecessors, (1382), 337 states have call successors, (337), 87 states have call predecessors, (337), 86 states have return successors, (328), 322 states have call predecessors, (328), 328 states have call successors, (328) [2021-11-12 23:28:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2047 transitions. [2021-11-12 23:28:29,879 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2047 transitions. Word has length 84 [2021-11-12 23:28:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 2047 transitions. [2021-11-12 23:28:29,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:28:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2047 transitions. [2021-11-12 23:28:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-12 23:28:29,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:29,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:29,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:30,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:30,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1570039191, now seen corresponding path program 1 times [2021-11-12 23:28:30,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:30,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059018730] [2021-11-12 23:28:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:30,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:28:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:28:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:28:33,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:28:34,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:34,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059018730] [2021-11-12 23:28:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059018730] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:34,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:34,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:28:34,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459271930] [2021-11-12 23:28:34,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:34,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:28:34,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:28:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:28:34,018 INFO L87 Difference]: Start difference. First operand 1438 states and 2047 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:28:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:34,668 INFO L93 Difference]: Finished difference Result 2874 states and 4162 transitions. [2021-11-12 23:28:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:28:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 84 [2021-11-12 23:28:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:34,694 INFO L225 Difference]: With dead ends: 2874 [2021-11-12 23:28:34,694 INFO L226 Difference]: Without dead ends: 1441 [2021-11-12 23:28:34,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:34,714 INFO L933 BasicCegarLoop]: 2038 mSDtfsCounter, 6 mSDsluCounter, 8134 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 298.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10172 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.57ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 332.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:34,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10172 Invalid, 63 Unknown, 0 Unchecked, 55.57ms Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 332.06ms Time] [2021-11-12 23:28:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-12 23:28:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1441. [2021-11-12 23:28:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1016 states have (on average 1.3631889763779528) internal successors, (1385), 1053 states have internal predecessors, (1385), 337 states have call successors, (337), 87 states have call predecessors, (337), 87 states have return successors, (331), 322 states have call predecessors, (331), 328 states have call successors, (331) [2021-11-12 23:28:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2053 transitions. [2021-11-12 23:28:34,817 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2053 transitions. Word has length 84 [2021-11-12 23:28:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2053 transitions. [2021-11-12 23:28:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:28:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2053 transitions. [2021-11-12 23:28:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:28:34,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:34,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:34,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:35,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:35,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash -394367958, now seen corresponding path program 1 times [2021-11-12 23:28:35,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:35,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481652157] [2021-11-12 23:28:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:35,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:35,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:35,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:28:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:37,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:28:38,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:28:39,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:39,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481652157] [2021-11-12 23:28:39,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481652157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:39,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [766121222] [2021-11-12 23:28:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:39,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:39,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:28:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:40,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:41,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [766121222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:41,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323515941] [2021-11-12 23:28:41,354 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:41,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:41,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:41,367 INFO L87 Difference]: Start difference. First operand 1441 states and 2053 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:28:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:41,886 INFO L93 Difference]: Finished difference Result 4248 states and 6056 transitions. [2021-11-12 23:28:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 87 [2021-11-12 23:28:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:41,922 INFO L225 Difference]: With dead ends: 4248 [2021-11-12 23:28:41,923 INFO L226 Difference]: Without dead ends: 2827 [2021-11-12 23:28:41,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:41,937 INFO L933 BasicCegarLoop]: 2403 mSDtfsCounter, 1986 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 241.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 4410 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.20ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:41,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 4410 Invalid, 17 Unknown, 0 Unchecked, 24.20ms Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 300.82ms Time] [2021-11-12 23:28:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2021-11-12 23:28:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2805. [2021-11-12 23:28:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 1981 states have (on average 1.364462392730944) internal successors, (2703), 2049 states have internal predecessors, (2703), 651 states have call successors, (651), 171 states have call predecessors, (651), 172 states have return successors, (648), 628 states have call predecessors, (648), 642 states have call successors, (648) [2021-11-12 23:28:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 4002 transitions. [2021-11-12 23:28:42,122 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 4002 transitions. Word has length 87 [2021-11-12 23:28:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:42,123 INFO L470 AbstractCegarLoop]: Abstraction has 2805 states and 4002 transitions. [2021-11-12 23:28:42,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:28:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 4002 transitions. [2021-11-12 23:28:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 23:28:42,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:42,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:28:42,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:42,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:42,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -203108278, now seen corresponding path program 1 times [2021-11-12 23:28:42,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:42,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300619781] [2021-11-12 23:28:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:42,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:42,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:42,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:42,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:28:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:28:45,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:28:46,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:46,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300619781] [2021-11-12 23:28:46,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300619781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:46,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1360307422] [2021-11-12 23:28:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:46,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:46,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:46,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:46,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:28:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:48,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1360307422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:49,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:49,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:49,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53570192] [2021-11-12 23:28:49,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:49,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:49,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:49,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:49,059 INFO L87 Difference]: Start difference. First operand 2805 states and 4002 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:28:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:49,205 INFO L93 Difference]: Finished difference Result 2807 states and 4003 transitions. [2021-11-12 23:28:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2021-11-12 23:28:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:49,235 INFO L225 Difference]: With dead ends: 2807 [2021-11-12 23:28:49,235 INFO L226 Difference]: Without dead ends: 2804 [2021-11-12 23:28:49,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:49,240 INFO L933 BasicCegarLoop]: 2044 mSDtfsCounter, 1989 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:49,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 2044 Invalid, 1 Unknown, 0 Unchecked, 11.02ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 4.55ms Time] [2021-11-12 23:28:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-11-12 23:28:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2021-11-12 23:28:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 1981 states have (on average 1.3639575971731448) internal successors, (2702), 2048 states have internal predecessors, (2702), 650 states have call successors, (650), 171 states have call predecessors, (650), 172 states have return successors, (648), 628 states have call predecessors, (648), 642 states have call successors, (648) [2021-11-12 23:28:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4000 transitions. [2021-11-12 23:28:49,522 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4000 transitions. Word has length 90 [2021-11-12 23:28:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:49,525 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 4000 transitions. [2021-11-12 23:28:49,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:28:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4000 transitions. [2021-11-12 23:28:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:28:49,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:49,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:49,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:49,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:49,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:49,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2001883384, now seen corresponding path program 1 times [2021-11-12 23:28:49,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:49,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802365319] [2021-11-12 23:28:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:49,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:49,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:49,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:49,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:28:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:28:52,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:28:53,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802365319] [2021-11-12 23:28:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802365319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:53,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1480636662] [2021-11-12 23:28:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:53,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:53,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:53,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:28:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:55,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:28:56,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1480636662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:56,140 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:56,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:56,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775077898] [2021-11-12 23:28:56,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:56,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:56,157 INFO L87 Difference]: Start difference. First operand 2804 states and 4000 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:28:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:56,286 INFO L93 Difference]: Finished difference Result 2806 states and 4001 transitions. [2021-11-12 23:28:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2021-11-12 23:28:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:56,323 INFO L225 Difference]: With dead ends: 2806 [2021-11-12 23:28:56,323 INFO L226 Difference]: Without dead ends: 2803 [2021-11-12 23:28:56,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:56,328 INFO L933 BasicCegarLoop]: 2042 mSDtfsCounter, 1986 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:56,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 2042 Invalid, 1 Unknown, 0 Unchecked, 8.06ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 2.46ms Time] [2021-11-12 23:28:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-11-12 23:28:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2803. [2021-11-12 23:28:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1981 states have (on average 1.3634528016153458) internal successors, (2701), 2047 states have internal predecessors, (2701), 649 states have call successors, (649), 171 states have call predecessors, (649), 172 states have return successors, (648), 628 states have call predecessors, (648), 642 states have call successors, (648) [2021-11-12 23:28:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 3998 transitions. [2021-11-12 23:28:56,530 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 3998 transitions. Word has length 91 [2021-11-12 23:28:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:56,531 INFO L470 AbstractCegarLoop]: Abstraction has 2803 states and 3998 transitions. [2021-11-12 23:28:56,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:28:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 3998 transitions. [2021-11-12 23:28:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:28:56,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:56,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:56,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:56,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:56,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:56,957 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1929331955, now seen corresponding path program 1 times [2021-11-12 23:28:56,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:56,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000056518] [2021-11-12 23:28:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:56,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:56,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:56,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:28:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:59,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:28:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:29:00,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:00,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000056518] [2021-11-12 23:29:00,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000056518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:00,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [844081715] [2021-11-12 23:29:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:00,697 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:00,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:00,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:29:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:02,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:03,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [844081715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:03,051 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:03,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:03,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504256594] [2021-11-12 23:29:03,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:03,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:03,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:03,053 INFO L87 Difference]: Start difference. First operand 2803 states and 3998 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:03,266 INFO L93 Difference]: Finished difference Result 4087 states and 5758 transitions. [2021-11-12 23:29:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2021-11-12 23:29:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:03,311 INFO L225 Difference]: With dead ends: 4087 [2021-11-12 23:29:03,312 INFO L226 Difference]: Without dead ends: 4083 [2021-11-12 23:29:03,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:03,318 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 1922 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:03,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 3526 Invalid, 7 Unknown, 0 Unchecked, 11.98ms Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 19.23ms Time] [2021-11-12 23:29:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2021-11-12 23:29:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4081. [2021-11-12 23:29:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 2879 states have (on average 1.3539423410906566) internal successors, (3898), 2967 states have internal predecessors, (3898), 923 states have call successors, (923), 275 states have call predecessors, (923), 278 states have return successors, (930), 898 states have call predecessors, (930), 918 states have call successors, (930) [2021-11-12 23:29:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5751 transitions. [2021-11-12 23:29:03,647 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5751 transitions. Word has length 92 [2021-11-12 23:29:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:03,648 INFO L470 AbstractCegarLoop]: Abstraction has 4081 states and 5751 transitions. [2021-11-12 23:29:03,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5751 transitions. [2021-11-12 23:29:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:29:03,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:03,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:03,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:03,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:04,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:04,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 319767211, now seen corresponding path program 1 times [2021-11-12 23:29:04,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:04,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801777376] [2021-11-12 23:29:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:04,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:04,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:04,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:29:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:29:06,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:29:07,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801777376] [2021-11-12 23:29:07,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801777376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:07,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861377269] [2021-11-12 23:29:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:07,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:07,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:07,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:29:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:09,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:09,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:09,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861377269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:10,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:10,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:10,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636823503] [2021-11-12 23:29:10,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:10,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:10,196 INFO L87 Difference]: Start difference. First operand 4081 states and 5751 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:10,415 INFO L93 Difference]: Finished difference Result 4119 states and 5789 transitions. [2021-11-12 23:29:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2021-11-12 23:29:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:10,455 INFO L225 Difference]: With dead ends: 4119 [2021-11-12 23:29:10,455 INFO L226 Difference]: Without dead ends: 4115 [2021-11-12 23:29:10,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:10,462 INFO L933 BasicCegarLoop]: 2039 mSDtfsCounter, 1915 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:10,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 2117 Invalid, 7 Unknown, 0 Unchecked, 7.83ms Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 18.09ms Time] [2021-11-12 23:29:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-11-12 23:29:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 4113. [2021-11-12 23:29:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 2899 states have (on average 1.350465677819938) internal successors, (3915), 2985 states have internal predecessors, (3915), 929 states have call successors, (929), 281 states have call predecessors, (929), 284 states have return successors, (938), 906 states have call predecessors, (938), 926 states have call successors, (938) [2021-11-12 23:29:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 5782 transitions. [2021-11-12 23:29:10,833 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 5782 transitions. Word has length 93 [2021-11-12 23:29:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:10,834 INFO L470 AbstractCegarLoop]: Abstraction has 4113 states and 5782 transitions. [2021-11-12 23:29:10,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 5782 transitions. [2021-11-12 23:29:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 23:29:10,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:10,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:10,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:11,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:11,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:11,264 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1322369488, now seen corresponding path program 1 times [2021-11-12 23:29:11,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:11,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915801040] [2021-11-12 23:29:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:11,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:11,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:11,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:11,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:29:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:29:13,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:29:14,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915801040] [2021-11-12 23:29:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915801040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1509613234] [2021-11-12 23:29:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:14,868 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:14,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:14,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:29:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:16,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:29:17,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1509613234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:17,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:17,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:17,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852675203] [2021-11-12 23:29:17,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:17,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:17,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:17,303 INFO L87 Difference]: Start difference. First operand 4113 states and 5782 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:17,515 INFO L93 Difference]: Finished difference Result 4115 states and 5783 transitions. [2021-11-12 23:29:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 94 [2021-11-12 23:29:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:17,554 INFO L225 Difference]: With dead ends: 4115 [2021-11-12 23:29:17,554 INFO L226 Difference]: Without dead ends: 4099 [2021-11-12 23:29:17,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:17,559 INFO L933 BasicCegarLoop]: 2033 mSDtfsCounter, 1973 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1973 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:17,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1973 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 7.17ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:29:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-11-12 23:29:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 4099. [2021-11-12 23:29:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 2888 states have (on average 1.350415512465374) internal successors, (3900), 2972 states have internal predecessors, (3900), 926 states have call successors, (926), 281 states have call predecessors, (926), 284 states have return successors, (936), 905 states have call predecessors, (936), 924 states have call successors, (936) [2021-11-12 23:29:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5762 transitions. [2021-11-12 23:29:17,921 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5762 transitions. Word has length 94 [2021-11-12 23:29:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:17,922 INFO L470 AbstractCegarLoop]: Abstraction has 4099 states and 5762 transitions. [2021-11-12 23:29:17,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:29:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5762 transitions. [2021-11-12 23:29:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:29:17,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:17,934 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:17,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:18,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:18,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:18,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -172060863, now seen corresponding path program 1 times [2021-11-12 23:29:18,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:18,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412061283] [2021-11-12 23:29:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:18,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:18,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:18,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:18,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:29:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:29:21,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:29:22,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:22,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412061283] [2021-11-12 23:29:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412061283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:22,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918931942] [2021-11-12 23:29:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:22,501 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:22,502 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:22,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:29:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:24,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-12 23:29:24,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-12 23:29:25,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918931942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:25,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:25,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:29:25,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56597504] [2021-11-12 23:29:25,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:25,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:25,101 INFO L87 Difference]: Start difference. First operand 4099 states and 5762 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:29:27,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:31,796 INFO L93 Difference]: Finished difference Result 12249 states and 17223 transitions. [2021-11-12 23:29:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:29:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 147 [2021-11-12 23:29:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:31,879 INFO L225 Difference]: With dead ends: 12249 [2021-11-12 23:29:31,879 INFO L226 Difference]: Without dead ends: 8170 [2021-11-12 23:29:31,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:31,913 INFO L933 BasicCegarLoop]: 4281 mSDtfsCounter, 3927 mSDsluCounter, 3652 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5525.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3927 SdHoareTripleChecker+Valid, 7933 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.26ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6076.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:31,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3927 Valid, 7933 Invalid, 689 Unknown, 0 Unchecked, 38.26ms Time], IncrementalHoareTripleChecker [17 Valid, 671 Invalid, 1 Unknown, 0 Unchecked, 6076.94ms Time] [2021-11-12 23:29:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8170 states. [2021-11-12 23:29:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8170 to 8158. [2021-11-12 23:29:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 5754 states have (on average 1.351233924226625) internal successors, (7775), 5922 states have internal predecessors, (7775), 1836 states have call successors, (1836), 560 states have call predecessors, (1836), 567 states have return successors, (1858), 1795 states have call predecessors, (1858), 1834 states have call successors, (1858) [2021-11-12 23:29:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 11469 transitions. [2021-11-12 23:29:32,636 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 11469 transitions. Word has length 147 [2021-11-12 23:29:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:32,637 INFO L470 AbstractCegarLoop]: Abstraction has 8158 states and 11469 transitions. [2021-11-12 23:29:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:29:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 11469 transitions. [2021-11-12 23:29:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:29:32,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:32,648 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:32,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:32,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:33,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:33,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1934455494, now seen corresponding path program 1 times [2021-11-12 23:29:33,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:33,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256378172] [2021-11-12 23:29:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:33,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:33,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:33,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:29:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:29:36,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-12 23:29:37,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:37,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256378172] [2021-11-12 23:29:37,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256378172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:37,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694788453] [2021-11-12 23:29:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:37,458 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:37,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:37,459 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:37,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:29:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:29:38,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-12 23:29:39,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-11-12 23:29:39,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694788453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:39,964 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:39,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:39,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225619428] [2021-11-12 23:29:39,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:39,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:39,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:39,967 INFO L87 Difference]: Start difference. First operand 8158 states and 11469 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:29:42,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:42,670 INFO L93 Difference]: Finished difference Result 8160 states and 11470 transitions. [2021-11-12 23:29:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 148 [2021-11-12 23:29:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:42,719 INFO L225 Difference]: With dead ends: 8160 [2021-11-12 23:29:42,719 INFO L226 Difference]: Without dead ends: 8157 [2021-11-12 23:29:42,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:42,728 INFO L933 BasicCegarLoop]: 2035 mSDtfsCounter, 65 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2260.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 3992 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2314.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:42,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 3992 Invalid, 4 Unknown, 0 Unchecked, 9.80ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2314.31ms Time] [2021-11-12 23:29:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2021-11-12 23:29:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 8157. [2021-11-12 23:29:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 5754 states have (on average 1.3505387556482447) internal successors, (7771), 5921 states have internal predecessors, (7771), 1835 states have call successors, (1835), 560 states have call predecessors, (1835), 567 states have return successors, (1858), 1795 states have call predecessors, (1858), 1834 states have call successors, (1858) [2021-11-12 23:29:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 11464 transitions. [2021-11-12 23:29:43,452 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 11464 transitions. Word has length 148 [2021-11-12 23:29:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 8157 states and 11464 transitions. [2021-11-12 23:29:43,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:29:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 11464 transitions. [2021-11-12 23:29:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:29:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:43,467 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:43,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:43,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:43,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:43,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:43,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1516442189, now seen corresponding path program 1 times [2021-11-12 23:29:43,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:43,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764284874] [2021-11-12 23:29:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:43,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:43,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:43,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:43,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:29:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:46,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:46,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:29:47,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:29:48,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:48,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764284874] [2021-11-12 23:29:48,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764284874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:48,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1429828991] [2021-11-12 23:29:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:48,214 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:48,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:48,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:29:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:49,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 23:29:50,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 23:29:50,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1429828991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:50,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:50,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539879482] [2021-11-12 23:29:50,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:50,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:50,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:50,658 INFO L87 Difference]: Start difference. First operand 8157 states and 11464 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:29:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:51,567 INFO L93 Difference]: Finished difference Result 19486 states and 27328 transitions. [2021-11-12 23:29:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:51,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 165 [2021-11-12 23:29:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:51,646 INFO L225 Difference]: With dead ends: 19486 [2021-11-12 23:29:51,646 INFO L226 Difference]: Without dead ends: 11349 [2021-11-12 23:29:51,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:51,705 INFO L933 BasicCegarLoop]: 2309 mSDtfsCounter, 1187 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.95ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 255.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:51,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 4284 Invalid, 20 Unknown, 0 Unchecked, 10.95ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 255.65ms Time] [2021-11-12 23:29:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11349 states. [2021-11-12 23:29:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11349 to 11349. [2021-11-12 23:29:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11349 states, 8098 states have (on average 1.3553963941714005) internal successors, (10976), 8322 states have internal predecessors, (10976), 2439 states have call successors, (2439), 800 states have call predecessors, (2439), 811 states have return successors, (2470), 2383 states have call predecessors, (2470), 2438 states have call successors, (2470) [2021-11-12 23:29:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11349 states to 11349 states and 15885 transitions. [2021-11-12 23:29:52,682 INFO L78 Accepts]: Start accepts. Automaton has 11349 states and 15885 transitions. Word has length 165 [2021-11-12 23:29:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 11349 states and 15885 transitions. [2021-11-12 23:29:52,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:29:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11349 states and 15885 transitions. [2021-11-12 23:29:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 23:29:52,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:52,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:52,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:52,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:29:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:53,135 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1854809490, now seen corresponding path program 1 times [2021-11-12 23:29:53,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:53,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932960162] [2021-11-12 23:29:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:53,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:53,144 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:29:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:55,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-12 23:29:56,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:29:57,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:57,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932960162] [2021-11-12 23:29:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932960162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:57,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [931261894] [2021-11-12 23:29:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:57,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:57,808 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 23:29:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-12 23:30:00,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:30:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [931261894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:00,766 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:30:00,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:30:00,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623634911] [2021-11-12 23:30:00,767 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:00,769 INFO L87 Difference]: Start difference. First operand 11349 states and 15885 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-12 23:30:02,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:06,111 INFO L93 Difference]: Finished difference Result 29752 states and 41499 transitions. [2021-11-12 23:30:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 212 [2021-11-12 23:30:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:06,257 INFO L225 Difference]: With dead ends: 29752 [2021-11-12 23:30:06,257 INFO L226 Difference]: Without dead ends: 18433 [2021-11-12 23:30:06,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:30:06,325 INFO L933 BasicCegarLoop]: 3480 mSDtfsCounter, 3096 mSDsluCounter, 3512 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4089.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3096 SdHoareTripleChecker+Valid, 6992 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.23ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4413.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:06,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3096 Valid, 6992 Invalid, 468 Unknown, 0 Unchecked, 21.23ms Time], IncrementalHoareTripleChecker [22 Valid, 445 Invalid, 1 Unknown, 0 Unchecked, 4413.15ms Time] [2021-11-12 23:30:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18433 states. [2021-11-12 23:30:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18433 to 18433. [2021-11-12 23:30:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18433 states, 13250 states have (on average 1.3550188679245283) internal successors, (17954), 13615 states have internal predecessors, (17954), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1374 states have return successors, (3855), 3720 states have call predecessors, (3855), 3807 states have call successors, (3855) [2021-11-12 23:30:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18433 states to 18433 states and 25617 transitions. [2021-11-12 23:30:08,053 INFO L78 Accepts]: Start accepts. Automaton has 18433 states and 25617 transitions. Word has length 212 [2021-11-12 23:30:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:08,060 INFO L470 AbstractCegarLoop]: Abstraction has 18433 states and 25617 transitions. [2021-11-12 23:30:08,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 4 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-12 23:30:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 18433 states and 25617 transitions. [2021-11-12 23:30:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-12 23:30:08,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:08,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:08,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:08,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:08,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:08,616 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2054436164, now seen corresponding path program 1 times [2021-11-12 23:30:08,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:08,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659221455] [2021-11-12 23:30:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:08,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:08,623 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:08,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:30:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 23:30:13,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-12 23:30:14,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:14,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659221455] [2021-11-12 23:30:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659221455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:14,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [287449233] [2021-11-12 23:30:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:14,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:30:14,832 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:30:14,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 23:30:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:16,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:30:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-12 23:30:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-12 23:30:18,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [287449233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:18,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:30:18,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-12 23:30:18,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403930479] [2021-11-12 23:30:18,363 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:18,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:18,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:18,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:18,365 INFO L87 Difference]: Start difference. First operand 18433 states and 25617 transitions. Second operand has 6 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-12 23:30:20,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:22,529 WARN L515 Checker$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 23:30:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:27,822 INFO L93 Difference]: Finished difference Result 46628 states and 65009 transitions. [2021-11-12 23:30:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:30:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 306 [2021-11-12 23:30:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:28,018 INFO L225 Difference]: With dead ends: 46628 [2021-11-12 23:30:28,019 INFO L226 Difference]: Without dead ends: 28225 [2021-11-12 23:30:28,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1208 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:30:28,111 INFO L933 BasicCegarLoop]: 4041 mSDtfsCounter, 3667 mSDsluCounter, 13327 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7000.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3667 SdHoareTripleChecker+Valid, 17368 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.64ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7430.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:28,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3667 Valid, 17368 Invalid, 625 Unknown, 0 Unchecked, 41.64ms Time], IncrementalHoareTripleChecker [37 Valid, 586 Invalid, 2 Unknown, 0 Unchecked, 7430.89ms Time] [2021-11-12 23:30:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28225 states. [2021-11-12 23:30:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28225 to 18441. [2021-11-12 23:30:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18441 states, 13258 states have (on average 1.35480464625132) internal successors, (17962), 13623 states have internal predecessors, (17962), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1374 states have return successors, (3855), 3720 states have call predecessors, (3855), 3807 states have call successors, (3855) [2021-11-12 23:30:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18441 states to 18441 states and 25625 transitions. [2021-11-12 23:30:30,102 INFO L78 Accepts]: Start accepts. Automaton has 18441 states and 25625 transitions. Word has length 306 [2021-11-12 23:30:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:30,103 INFO L470 AbstractCegarLoop]: Abstraction has 18441 states and 25625 transitions. [2021-11-12 23:30:30,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2021-11-12 23:30:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 18441 states and 25625 transitions. [2021-11-12 23:30:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-11-12 23:30:30,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:30,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:30,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:30,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:30,720 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2028013865, now seen corresponding path program 1 times [2021-11-12 23:30:30,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:30,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738840636] [2021-11-12 23:30:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:30,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:30,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:30,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:30,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:30:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:34,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-12 23:30:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-12 23:30:37,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:37,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738840636] [2021-11-12 23:30:37,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738840636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:37,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690447193] [2021-11-12 23:30:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:37,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:37,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:30:37,319 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:30:37,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 23:30:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-12 23:30:40,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-12 23:30:42,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [690447193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:42,849 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:30:42,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [7, 7] total 27 [2021-11-12 23:30:42,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664266243] [2021-11-12 23:30:42,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:42,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:30:42,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:42,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:30:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:30:42,852 INFO L87 Difference]: Start difference. First operand 18441 states and 25625 transitions. Second operand has 18 states, 18 states have (on average 13.944444444444445) internal successors, (251), 14 states have internal predecessors, (251), 4 states have call successors, (74), 2 states have call predecessors, (74), 6 states have return successors, (74), 8 states have call predecessors, (74), 4 states have call successors, (74) [2021-11-12 23:30:45,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:47,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:53,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:55,728 WARN L515 Checker$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 23:30:58,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:00,461 WARN L515 Checker$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 23:31:08,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:10,050 WARN L515 Checker$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 23:31:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:12,233 INFO L93 Difference]: Finished difference Result 47740 states and 66947 transitions. [2021-11-12 23:31:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-12 23:31:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.944444444444445) internal successors, (251), 14 states have internal predecessors, (251), 4 states have call successors, (74), 2 states have call predecessors, (74), 6 states have return successors, (74), 8 states have call predecessors, (74), 4 states have call successors, (74) Word has length 385 [2021-11-12 23:31:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:12,407 INFO L225 Difference]: With dead ends: 47740 [2021-11-12 23:31:12,408 INFO L226 Difference]: Without dead ends: 29329 [2021-11-12 23:31:12,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 1514 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=339, Invalid=3567, Unknown=0, NotChecked=0, Total=3906 [2021-11-12 23:31:12,490 INFO L933 BasicCegarLoop]: 5523 mSDtfsCounter, 4420 mSDsluCounter, 60266 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 192 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22941.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 65789 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 146.78ms SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23844.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:12,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 65789 Invalid, 1900 Unknown, 0 Unchecked, 146.78ms Time], IncrementalHoareTripleChecker [192 Valid, 1700 Invalid, 8 Unknown, 0 Unchecked, 23844.82ms Time] [2021-11-12 23:31:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29329 states. [2021-11-12 23:31:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29329 to 18489. [2021-11-12 23:31:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18489 states, 13294 states have (on average 1.3538438393260117) internal successors, (17998), 13659 states have internal predecessors, (17998), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1386 states have return successors, (3911), 3732 states have call predecessors, (3911), 3807 states have call successors, (3911) [2021-11-12 23:31:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18489 states to 18489 states and 25717 transitions. [2021-11-12 23:31:14,267 INFO L78 Accepts]: Start accepts. Automaton has 18489 states and 25717 transitions. Word has length 385 [2021-11-12 23:31:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:14,268 INFO L470 AbstractCegarLoop]: Abstraction has 18489 states and 25717 transitions. [2021-11-12 23:31:14,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.944444444444445) internal successors, (251), 14 states have internal predecessors, (251), 4 states have call successors, (74), 2 states have call predecessors, (74), 6 states have return successors, (74), 8 states have call predecessors, (74), 4 states have call successors, (74) [2021-11-12 23:31:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 18489 states and 25717 transitions. [2021-11-12 23:31:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-12 23:31:14,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:14,353 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:14,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:14,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:14,768 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2019035798, now seen corresponding path program 1 times [2021-11-12 23:31:14,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:14,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074524580] [2021-11-12 23:31:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:14,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:14,775 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:14,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:31:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:31:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:31:20,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:31:22,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:22,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074524580] [2021-11-12 23:31:22,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074524580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:22,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453891406] [2021-11-12 23:31:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:22,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:22,576 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:22,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 23:31:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:31:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-12 23:31:26,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-12 23:31:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453891406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:28,697 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:31:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7, 7] total 13 [2021-11-12 23:31:28,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385437251] [2021-11-12 23:31:28,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:28,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:28,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:28,702 INFO L87 Difference]: Start difference. First operand 18489 states and 25717 transitions. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2021-11-12 23:31:30,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:35,908 INFO L93 Difference]: Finished difference Result 36948 states and 52227 transitions. [2021-11-12 23:31:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:31:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) Word has length 504 [2021-11-12 23:31:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:36,002 INFO L225 Difference]: With dead ends: 36948 [2021-11-12 23:31:36,002 INFO L226 Difference]: Without dead ends: 18489 [2021-11-12 23:31:36,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2012 GetRequests, 2001 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:31:36,099 INFO L933 BasicCegarLoop]: 1892 mSDtfsCounter, 1772 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5423.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.78ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5915.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:36,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 3128 Invalid, 846 Unknown, 0 Unchecked, 15.78ms Time], IncrementalHoareTripleChecker [62 Valid, 783 Invalid, 1 Unknown, 0 Unchecked, 5915.29ms Time] [2021-11-12 23:31:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18489 states. [2021-11-12 23:31:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18489 to 18489. [2021-11-12 23:31:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18489 states, 13294 states have (on average 1.2983300737174666) internal successors, (17260), 13659 states have internal predecessors, (17260), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1386 states have return successors, (3911), 3732 states have call predecessors, (3911), 3807 states have call successors, (3911) [2021-11-12 23:31:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18489 states to 18489 states and 24979 transitions. [2021-11-12 23:31:37,535 INFO L78 Accepts]: Start accepts. Automaton has 18489 states and 24979 transitions. Word has length 504 [2021-11-12 23:31:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:37,537 INFO L470 AbstractCegarLoop]: Abstraction has 18489 states and 24979 transitions. [2021-11-12 23:31:37,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (84), 4 states have call predecessors, (84), 4 states have call successors, (84) [2021-11-12 23:31:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18489 states and 24979 transitions. [2021-11-12 23:31:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-12 23:31:37,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:37,619 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:37,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-12 23:31:37,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-12 23:31:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:38,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1458988068, now seen corresponding path program 1 times [2021-11-12 23:31:38,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:38,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578951940] [2021-11-12 23:31:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:38,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:38,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:38,042 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:38,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:31:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:31:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:31:43,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:31:45,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:45,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578951940] [2021-11-12 23:31:45,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578951940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:45,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55682098] [2021-11-12 23:31:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:45,733 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:45,734 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:45,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 23:31:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:31:47,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-12 23:31:49,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-12 23:31:50,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55682098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:50,616 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:31:50,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-12 23:31:50,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955365827] [2021-11-12 23:31:50,617 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:50,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:31:50,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:31:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:31:50,620 INFO L87 Difference]: Start difference. First operand 18489 states and 24979 transitions. Second operand has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 23:31:53,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:55,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:57,281 WARN L515 Checker$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 23:31:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:58,411 INFO L93 Difference]: Finished difference Result 37028 states and 50031 transitions. [2021-11-12 23:31:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:31:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 504 [2021-11-12 23:31:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:58,510 INFO L225 Difference]: With dead ends: 37028 [2021-11-12 23:31:58,510 INFO L226 Difference]: Without dead ends: 18569 [2021-11-12 23:31:58,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2014 GetRequests, 1999 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:31:58,578 INFO L933 BasicCegarLoop]: 1957 mSDtfsCounter, 10 mSDsluCounter, 7775 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6222.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9732 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.56ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6302.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:58,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 9732 Invalid, 60 Unknown, 0 Unchecked, 13.56ms Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 3 Unknown, 0 Unchecked, 6302.81ms Time] [2021-11-12 23:31:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18569 states. [2021-11-12 23:31:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18569 to 18505. [2021-11-12 23:31:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18505 states, 13310 states have (on average 1.2979714500375656) internal successors, (17276), 13675 states have internal predecessors, (17276), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1386 states have return successors, (3911), 3732 states have call predecessors, (3911), 3807 states have call successors, (3911) [2021-11-12 23:31:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18505 states to 18505 states and 24995 transitions. [2021-11-12 23:32:00,000 INFO L78 Accepts]: Start accepts. Automaton has 18505 states and 24995 transitions. Word has length 504 [2021-11-12 23:32:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:00,003 INFO L470 AbstractCegarLoop]: Abstraction has 18505 states and 24995 transitions. [2021-11-12 23:32:00,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 2 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-12 23:32:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18505 states and 24995 transitions. [2021-11-12 23:32:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-12 23:32:00,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:00,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:00,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-12 23:32:00,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-12 23:32:00,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:00,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -740893088, now seen corresponding path program 1 times [2021-11-12 23:32:00,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:00,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775920820] [2021-11-12 23:32:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:00,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:00,464 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:32:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 2576 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:04,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:32:06,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:32:08,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:08,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775920820] [2021-11-12 23:32:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775920820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:08,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [645611987] [2021-11-12 23:32:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:08,025 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:08,026 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:08,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 23:32:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2576 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:32:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-12 23:32:11,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-12 23:32:13,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [645611987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:13,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:13,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-12 23:32:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216912018] [2021-11-12 23:32:13,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:13,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:32:13,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:32:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:32:13,077 INFO L87 Difference]: Start difference. First operand 18505 states and 24995 transitions. Second operand has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 23:32:15,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:16,720 INFO L93 Difference]: Finished difference Result 37028 states and 50023 transitions. [2021-11-12 23:32:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:32:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 506 [2021-11-12 23:32:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:16,842 INFO L225 Difference]: With dead ends: 37028 [2021-11-12 23:32:16,843 INFO L226 Difference]: Without dead ends: 18553 [2021-11-12 23:32:16,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2021 GetRequests, 2007 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:32:16,907 INFO L933 BasicCegarLoop]: 1957 mSDtfsCounter, 8 mSDsluCounter, 5843 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2160.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7800 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.88ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2200.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:16,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 7800 Invalid, 39 Unknown, 0 Unchecked, 12.88ms Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2200.30ms Time] [2021-11-12 23:32:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18553 states. [2021-11-12 23:32:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18553 to 18521. [2021-11-12 23:32:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18521 states, 13326 states have (on average 1.2976136875281405) internal successors, (17292), 13691 states have internal predecessors, (17292), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1386 states have return successors, (3911), 3732 states have call predecessors, (3911), 3807 states have call successors, (3911) [2021-11-12 23:32:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18521 states to 18521 states and 25011 transitions. [2021-11-12 23:32:18,320 INFO L78 Accepts]: Start accepts. Automaton has 18521 states and 25011 transitions. Word has length 506 [2021-11-12 23:32:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 18521 states and 25011 transitions. [2021-11-12 23:32:18,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.666666666666664) internal successors, (334), 6 states have internal predecessors, (334), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 23:32:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 18521 states and 25011 transitions. [2021-11-12 23:32:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-11-12 23:32:18,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:18,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:18,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:18,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:18,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:18,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:18,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:18,769 INFO L85 PathProgramCache]: Analyzing trace with hash -165223567, now seen corresponding path program 1 times [2021-11-12 23:32:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:18,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750161814] [2021-11-12 23:32:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:18,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:18,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:18,775 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:18,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:32:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:22,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:22,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:32:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:32:26,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:26,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750161814] [2021-11-12 23:32:26,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750161814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:26,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1776878839] [2021-11-12 23:32:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:26,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:26,265 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:26,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:32:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:32:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-12 23:32:29,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-12 23:32:31,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1776878839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:31,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:31,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 23:32:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624556439] [2021-11-12 23:32:31,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:31,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:32:31,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:32:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:32:31,489 INFO L87 Difference]: Start difference. First operand 18521 states and 25011 transitions. Second operand has 8 states, 8 states have (on average 41.625) internal successors, (333), 6 states have internal predecessors, (333), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 23:32:33,973 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 23:32:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:35,154 INFO L93 Difference]: Finished difference Result 37124 states and 50175 transitions. [2021-11-12 23:32:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:32:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 6 states have internal predecessors, (333), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) Word has length 512 [2021-11-12 23:32:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:35,228 INFO L225 Difference]: With dead ends: 37124 [2021-11-12 23:32:35,228 INFO L226 Difference]: Without dead ends: 18633 [2021-11-12 23:32:35,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2044 GetRequests, 2029 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:32:35,281 INFO L933 BasicCegarLoop]: 1955 mSDtfsCounter, 6 mSDsluCounter, 9746 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2199.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11701 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.03ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2237.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:35,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 11701 Invalid, 65 Unknown, 0 Unchecked, 17.03ms Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 2237.68ms Time] [2021-11-12 23:32:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18633 states. [2021-11-12 23:32:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18633 to 18593. [2021-11-12 23:32:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18593 states, 13382 states have (on average 1.2969660738305187) internal successors, (17356), 13747 states have internal predecessors, (17356), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1402 states have return successors, (3943), 3748 states have call predecessors, (3943), 3807 states have call successors, (3943) [2021-11-12 23:32:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18593 states to 18593 states and 25107 transitions. [2021-11-12 23:32:36,601 INFO L78 Accepts]: Start accepts. Automaton has 18593 states and 25107 transitions. Word has length 512 [2021-11-12 23:32:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:36,603 INFO L470 AbstractCegarLoop]: Abstraction has 18593 states and 25107 transitions. [2021-11-12 23:32:36,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.625) internal successors, (333), 6 states have internal predecessors, (333), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (84), 4 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-12 23:32:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 18593 states and 25107 transitions. [2021-11-12 23:32:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-11-12 23:32:36,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:36,656 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:36,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:36,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-12 23:32:37,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:37,072 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1562773088, now seen corresponding path program 1 times [2021-11-12 23:32:37,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:37,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453925399] [2021-11-12 23:32:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:37,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:37,081 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:37,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:32:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:32:42,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:32:44,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:44,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453925399] [2021-11-12 23:32:44,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453925399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:44,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1167247695] [2021-11-12 23:32:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:44,491 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:44,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:44,492 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:44,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:32:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:46,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-12 23:32:48,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-12 23:32:49,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1167247695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:49,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:32:49,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [7, 7] total 17 [2021-11-12 23:32:49,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483872010] [2021-11-12 23:32:49,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:49,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:32:49,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:32:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:32:49,633 INFO L87 Difference]: Start difference. First operand 18593 states and 25107 transitions. Second operand has 8 states, 8 states have (on average 41.875) internal successors, (335), 7 states have internal predecessors, (335), 2 states have call successors, (84), 2 states have call predecessors, (84), 3 states have return successors, (83), 3 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-12 23:32:51,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:53,946 WARN L515 Checker$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 23:32:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:54,958 INFO L93 Difference]: Finished difference Result 37228 states and 50275 transitions. [2021-11-12 23:32:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:32:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 41.875) internal successors, (335), 7 states have internal predecessors, (335), 2 states have call successors, (84), 2 states have call predecessors, (84), 3 states have return successors, (83), 3 states have call predecessors, (83), 2 states have call successors, (83) Word has length 513 [2021-11-12 23:32:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:55,043 INFO L225 Difference]: With dead ends: 37228 [2021-11-12 23:32:55,043 INFO L226 Difference]: Without dead ends: 18665 [2021-11-12 23:32:55,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2049 GetRequests, 2033 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:32:55,102 INFO L933 BasicCegarLoop]: 1960 mSDtfsCounter, 10 mSDsluCounter, 9740 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4212.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11700 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.00ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4276.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:55,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 11700 Invalid, 68 Unknown, 0 Unchecked, 13.00ms Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 2 Unknown, 0 Unchecked, 4276.60ms Time] [2021-11-12 23:32:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-11-12 23:32:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 18609. [2021-11-12 23:32:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18609 states, 13398 states have (on average 1.296611434542469) internal successors, (17372), 13763 states have internal predecessors, (17372), 3808 states have call successors, (3808), 1355 states have call predecessors, (3808), 1402 states have return successors, (3943), 3748 states have call predecessors, (3943), 3807 states have call successors, (3943) [2021-11-12 23:32:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18609 states to 18609 states and 25123 transitions. [2021-11-12 23:32:56,568 INFO L78 Accepts]: Start accepts. Automaton has 18609 states and 25123 transitions. Word has length 513 [2021-11-12 23:32:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 18609 states and 25123 transitions. [2021-11-12 23:32:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 41.875) internal successors, (335), 7 states have internal predecessors, (335), 2 states have call successors, (84), 2 states have call predecessors, (84), 3 states have return successors, (83), 3 states have call predecessors, (83), 2 states have call successors, (83) [2021-11-12 23:32:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 18609 states and 25123 transitions. [2021-11-12 23:32:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-11-12 23:32:56,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:56,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:56,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:56,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:57,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:57,031 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1085715540, now seen corresponding path program 1 times [2021-11-12 23:32:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085913660] [2021-11-12 23:32:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:57,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:57,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:57,038 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:57,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:33:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:33:00,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:33:02,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:33:04,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:04,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085913660] [2021-11-12 23:33:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085913660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:04,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896210705] [2021-11-12 23:33:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:04,875 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:04,876 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:04,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:33:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:06,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:33:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 168 proven. 37 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-12 23:33:09,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:33:13,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896210705] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:33:13,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:33:13,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 5] total 15 [2021-11-12 23:33:13,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684699244] [2021-11-12 23:33:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:13,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:33:13,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:33:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:33:13,157 INFO L87 Difference]: Start difference. First operand 18609 states and 25123 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 5 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-12 23:33:16,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:19,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:27,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:29,579 WARN L515 Checker$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 23:33:35,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:37,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:40,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:52,323 INFO L93 Difference]: Finished difference Result 65503 states and 91951 transitions. [2021-11-12 23:33:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 5 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) Word has length 523 [2021-11-12 23:33:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:52,599 INFO L225 Difference]: With dead ends: 65503 [2021-11-12 23:33:52,599 INFO L226 Difference]: Without dead ends: 46924 [2021-11-12 23:33:52,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2090 GetRequests, 2076 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:33:52,688 INFO L933 BasicCegarLoop]: 2697 mSDtfsCounter, 4572 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 1353 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33082.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4887 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 4432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.49ms SdHoareTripleChecker+Time, 1353 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35596.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:52,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4887 Valid, 5196 Invalid, 4432 Unknown, 0 Unchecked, 70.49ms Time], IncrementalHoareTripleChecker [1353 Valid, 3077 Invalid, 2 Unknown, 0 Unchecked, 35596.79ms Time] [2021-11-12 23:33:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-12 23:33:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 45545. [2021-11-12 23:33:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45545 states, 32732 states have (on average 1.2991567884638886) internal successors, (42524), 33682 states have internal predecessors, (42524), 9771 states have call successors, (9771), 2706 states have call predecessors, (9771), 3041 states have return successors, (11682), 9856 states have call predecessors, (11682), 9770 states have call successors, (11682) [2021-11-12 23:33:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45545 states to 45545 states and 63977 transitions. [2021-11-12 23:33:56,269 INFO L78 Accepts]: Start accepts. Automaton has 45545 states and 63977 transitions. Word has length 523 [2021-11-12 23:33:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:56,271 INFO L470 AbstractCegarLoop]: Abstraction has 45545 states and 63977 transitions. [2021-11-12 23:33:56,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 5 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-12 23:33:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 45545 states and 63977 transitions. [2021-11-12 23:33:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-11-12 23:33:56,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:56,749 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:33:56,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:57,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:57,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:57,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2011646536, now seen corresponding path program 1 times [2021-11-12 23:33:57,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:57,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299219604] [2021-11-12 23:33:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:57,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:57,157 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:57,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:34:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-12 23:34:02,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 23:34:04,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:04,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299219604] [2021-11-12 23:34:04,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299219604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:04,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295326549] [2021-11-12 23:34:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:04,702 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:04,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:04,703 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:04,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6f21ad-0726-4980-ab36-e76d25c98d14/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:34:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:34:06,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 168 proven. 37 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-12 23:34:09,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:34:12,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295326549] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:34:12,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:34:12,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 5] total 15 [2021-11-12 23:34:12,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996893267] [2021-11-12 23:34:12,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:12,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:34:12,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:12,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:34:12,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:34:12,214 INFO L87 Difference]: Start difference. First operand 45545 states and 63977 transitions. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 5 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-12 23:34:14,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:16,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:19,772 WARN L515 Checker$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 23:34:25,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:27,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:29,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:31,982 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:33,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:35,046 WARN L515 Checker$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 23:34:39,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:41,314 WARN L515 Checker$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 23:34:43,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:46,645 WARN L515 Checker$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 23:35:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:05,852 INFO L93 Difference]: Finished difference Result 173407 states and 269681 transitions. [2021-11-12 23:35:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:35:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 5 states have internal predecessors, (264), 5 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (56), 5 states have call predecessors, (56), 5 states have call successors, (56) Word has length 524 [2021-11-12 23:35:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:07,206 INFO L225 Difference]: With dead ends: 173407 [2021-11-12 23:35:07,206 INFO L226 Difference]: Without dead ends: 127892 [2021-11-12 23:35:07,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2094 GetRequests, 2080 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:35:07,903 INFO L933 BasicCegarLoop]: 2643 mSDtfsCounter, 3406 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 3221 mSolverCounterSat, 573 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39977.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 5630 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.86ms SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 3221 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42337.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:07,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3721 Valid, 5630 Invalid, 3800 Unknown, 0 Unchecked, 57.86ms Time], IncrementalHoareTripleChecker [573 Valid, 3221 Invalid, 6 Unknown, 0 Unchecked, 42337.31ms Time] [2021-11-12 23:35:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127892 states.