./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--md--dm-raid.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:01:32,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:32,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:32,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:32,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:32,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:32,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:32,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:32,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:32,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:32,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:32,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:32,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:32,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:32,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:32,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:32,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:32,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:32,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:32,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:32,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:32,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:32,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:32,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:32,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:32,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:32,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:32,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:32,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:32,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:32,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:32,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:32,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:32,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:32,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:32,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:32,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:32,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:32,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:32,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:32,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:32,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:01:32,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:32,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:32,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:32,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:32,166 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:32,167 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:32,167 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:32,168 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:01:32,168 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:32,169 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:32,169 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:01:32,169 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:01:32,170 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:32,170 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:01:32,171 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:01:32,171 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:01:32,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:32,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:01:32,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:32,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:01:32,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:32,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:01:32,174 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:32,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:01:32,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:32,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:01:32,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:32,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:32,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:32,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:32,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:32,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:01:32,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:01:32,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:01:32,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:01:32,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:32,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:32,178 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_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2021-11-19 14:01:32,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:32,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:32,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:32,525 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:32,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:32,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2021-11-19 14:01:32,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/14f0caf40/7a3f63f12d9e4ee19e069b0796d7d2cc/FLAG6961e6245 [2021-11-19 14:01:33,492 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:33,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2021-11-19 14:01:33,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/14f0caf40/7a3f63f12d9e4ee19e069b0796d7d2cc/FLAG6961e6245 [2021-11-19 14:01:33,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/14f0caf40/7a3f63f12d9e4ee19e069b0796d7d2cc [2021-11-19 14:01:33,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:33,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:33,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:33,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:33,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:33,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:33" (1/1) ... [2021-11-19 14:01:33,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a66973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:33, skipping insertion in model container [2021-11-19 14:01:33,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:33" (1/1) ... [2021-11-19 14:01:33,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:34,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:35,618 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,637 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,666 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,683 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,688 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,689 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,691 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,693 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,706 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,706 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,708 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,710 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,712 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,713 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,828 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,829 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:01:35,890 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2021-11-19 14:01:36,057 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:36,075 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:01:36,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b04b6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:36, skipping insertion in model container [2021-11-19 14:01:36,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:36,077 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:01:36,079 INFO L158 Benchmark]: Toolchain (without parser) took 2127.76ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 60.7MB in the beginning and 70.2MB in the end (delta: -9.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-19 14:01:36,080 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory was 57.8MB in the beginning and 57.8MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:01:36,081 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2124.77ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 60.5MB in the beginning and 70.2MB in the end (delta: -9.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-19 14:01:36,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory was 57.8MB in the beginning and 57.8MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2124.77ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 60.5MB in the beginning and 70.2MB in the end (delta: -9.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4703]: 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_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:01:38,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:38,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:38,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:38,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:38,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:38,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:38,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:38,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:38,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:38,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:38,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:38,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:38,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:38,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:38,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:38,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:38,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:38,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:38,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:38,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:38,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:38,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:38,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:38,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:38,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:38,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:38,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:38,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:38,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:38,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:38,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:38,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:38,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:38,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:38,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:38,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:38,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:38,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:38,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:38,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:38,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:01:38,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:38,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:38,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:38,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:38,608 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:38,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:38,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:38,608 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:38,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:38,609 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:38,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:38,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:38,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:01:38,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:38,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:01:38,613 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:38,613 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:01:38,613 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:01:38,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:01:38,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:38,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:01:38,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:38,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:01:38,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:38,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:38,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:38,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:38,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:01:38,616 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:01:38,616 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:38,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:01:38,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:38,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:38,617 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_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2021-11-19 14:01:38,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:39,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:39,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:39,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:39,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:39,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2021-11-19 14:01:39,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/c40833885/a8b06881a71841e29eccd5dd35609e5f/FLAG4a00709e0 [2021-11-19 14:01:40,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:40,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2021-11-19 14:01:40,049 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/c40833885/a8b06881a71841e29eccd5dd35609e5f/FLAG4a00709e0 [2021-11-19 14:01:40,473 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/data/c40833885/a8b06881a71841e29eccd5dd35609e5f [2021-11-19 14:01:40,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:40,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:40,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:40,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:40,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:40,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:40" (1/1) ... [2021-11-19 14:01:40,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3f8f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:40, skipping insertion in model container [2021-11-19 14:01:40,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:40" (1/1) ... [2021-11-19 14:01:40,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:40,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:42,441 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2021-11-19 14:01:42,626 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:42,653 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:01:42,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:43,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2021-11-19 14:01:43,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:43,241 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:01:43,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2021-11-19 14:01:43,561 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:43,693 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:01:43,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43 WrapperNode [2021-11-19 14:01:43,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:43,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:43,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:01:43,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:01:43,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,951 INFO L137 Inliner]: procedures = 229, calls = 1591, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4302 [2021-11-19 14:01:43,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:43,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:01:43,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:01:43,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:01:43,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:01:44,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:01:44,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:01:44,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:01:44,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:44,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:44,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:01:44,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:01:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2021-11-19 14:01:44,296 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2021-11-19 14:01:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:01:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2021-11-19 14:01:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2021-11-19 14:01:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:01:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:01:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:01:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:01:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:01:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:01:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:01:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-19 14:01:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-19 14:01:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2021-11-19 14:01:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2021-11-19 14:01:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:01:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:01:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2021-11-19 14:01:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2021-11-19 14:01:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2021-11-19 14:01:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2021-11-19 14:01:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:01:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:01:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 14:01:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 14:01:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2021-11-19 14:01:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2021-11-19 14:01:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:01:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:01:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:01:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:01:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2021-11-19 14:01:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2021-11-19 14:01:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-19 14:01:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-19 14:01:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2021-11-19 14:01:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2021-11-19 14:01:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-19 14:01:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-19 14:01:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:01:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2021-11-19 14:01:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2021-11-19 14:01:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:01:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:01:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2021-11-19 14:01:44,302 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2021-11-19 14:01:44,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:01:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:01:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:01:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:01:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:01:44,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:01:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:01:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:01:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2021-11-19 14:01:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2021-11-19 14:01:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2021-11-19 14:01:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2021-11-19 14:01:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2021-11-19 14:01:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2021-11-19 14:01:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2021-11-19 14:01:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2021-11-19 14:01:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:01:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:01:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2021-11-19 14:01:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2021-11-19 14:01:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2021-11-19 14:01:44,306 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2021-11-19 14:01:44,306 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-19 14:01:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-19 14:01:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2021-11-19 14:01:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2021-11-19 14:01:44,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:01:44,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:01:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:01:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2021-11-19 14:01:44,308 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2021-11-19 14:01:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 14:01:44,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 14:01:44,308 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2021-11-19 14:01:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2021-11-19 14:01:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:01:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:01:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-19 14:01:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2021-11-19 14:01:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2021-11-19 14:01:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2021-11-19 14:01:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2021-11-19 14:01:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2021-11-19 14:01:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2021-11-19 14:01:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2021-11-19 14:01:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:01:44,311 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:01:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2021-11-19 14:01:44,311 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2021-11-19 14:01:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2021-11-19 14:01:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2021-11-19 14:01:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:01:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:01:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 14:01:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 14:01:45,036 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:01:45,041 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:01:47,118 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:02:14,719 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:02:14,746 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:02:14,746 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:02:14,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:14 BoogieIcfgContainer [2021-11-19 14:02:14,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:02:14,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:02:14,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:02:14,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:02:14,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:01:40" (1/3) ... [2021-11-19 14:02:14,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556c8b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:14, skipping insertion in model container [2021-11-19 14:02:14,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43" (2/3) ... [2021-11-19 14:02:14,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556c8b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:14, skipping insertion in model container [2021-11-19 14:02:14,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:14" (3/3) ... [2021-11-19 14:02:14,760 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2021-11-19 14:02:14,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:02:14,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:02:14,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:02:14,868 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:02:14,869 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:02:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 1134 states, 873 states have (on average 1.4421534936998854) internal successors, (1259), 894 states have internal predecessors, (1259), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) [2021-11-19 14:02:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 14:02:14,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:14,935 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:14,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1014089832, now seen corresponding path program 1 times [2021-11-19 14:02:14,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:14,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218225786] [2021-11-19 14:02:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:14,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:14,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:14,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:14,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:02:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:02:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-19 14:02:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-11-19 14:02:17,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:17,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218225786] [2021-11-19 14:02:17,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218225786] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:02:17,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:02:17,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:02:17,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530914347] [2021-11-19 14:02:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:02:17,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:02:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:02:17,423 INFO L87 Difference]: Start difference. First operand has 1134 states, 873 states have (on average 1.4421534936998854) internal successors, (1259), 894 states have internal predecessors, (1259), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:02:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:17,618 INFO L93 Difference]: Finished difference Result 2263 states and 3384 transitions. [2021-11-19 14:02:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:02:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 221 [2021-11-19 14:02:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:17,662 INFO L225 Difference]: With dead ends: 2263 [2021-11-19 14:02:17,662 INFO L226 Difference]: Without dead ends: 1122 [2021-11-19 14:02:17,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:02:17,681 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:17,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-19 14:02:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-19 14:02:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 867 states have (on average 1.4359861591695502) internal successors, (1245), 882 states have internal predecessors, (1245), 212 states have call successors, (212), 43 states have call predecessors, (212), 42 states have return successors, (207), 203 states have call predecessors, (207), 207 states have call successors, (207) [2021-11-19 14:02:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1664 transitions. [2021-11-19 14:02:17,843 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1664 transitions. Word has length 221 [2021-11-19 14:02:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:17,843 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1664 transitions. [2021-11-19 14:02:17,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:02:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1664 transitions. [2021-11-19 14:02:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-19 14:02:17,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:17,859 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:17,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:02:18,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:18,067 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash -814978680, now seen corresponding path program 1 times [2021-11-19 14:02:18,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:18,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090833258] [2021-11-19 14:02:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:18,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:18,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:18,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:02:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1571 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:02:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-19 14:02:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-19 14:02:20,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:20,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090833258] [2021-11-19 14:02:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090833258] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:02:20,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:02:20,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 14:02:20,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369221052] [2021-11-19 14:02:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:20,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:02:20,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:02:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:02:20,424 INFO L87 Difference]: Start difference. First operand 1122 states and 1664 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:02:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:20,914 INFO L93 Difference]: Finished difference Result 2230 states and 3313 transitions. [2021-11-19 14:02:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:02:20,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 221 [2021-11-19 14:02:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:20,929 INFO L225 Difference]: With dead ends: 2230 [2021-11-19 14:02:20,929 INFO L226 Difference]: Without dead ends: 1125 [2021-11-19 14:02:20,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:02:20,936 INFO L933 BasicCegarLoop]: 1653 mSDtfsCounter, 6 mSDsluCounter, 6591 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8244 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:20,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8244 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:02:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-19 14:02:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1125. [2021-11-19 14:02:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 869 states have (on average 1.4361334867663982) internal successors, (1248), 885 states have internal predecessors, (1248), 212 states have call successors, (212), 43 states have call predecessors, (212), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2021-11-19 14:02:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1668 transitions. [2021-11-19 14:02:21,010 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1668 transitions. Word has length 221 [2021-11-19 14:02:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1668 transitions. [2021-11-19 14:02:21,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 14:02:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1668 transitions. [2021-11-19 14:02:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-19 14:02:21,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:21,015 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:21,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1060024339, now seen corresponding path program 1 times [2021-11-19 14:02:21,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:21,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510817367] [2021-11-19 14:02:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:21,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:21,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:21,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:02:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-19 14:02:22,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-19 14:02:24,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:24,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510817367] [2021-11-19 14:02:24,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510817367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:24,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827180771] [2021-11-19 14:02:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:24,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:24,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:24,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:24,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:02:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:26,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:27,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827180771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:27,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:27,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:27,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976476487] [2021-11-19 14:02:27,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:27,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:27,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:27,061 INFO L87 Difference]: Start difference. First operand 1125 states and 1668 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, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:27,121 INFO L93 Difference]: Finished difference Result 1127 states and 1669 transitions. [2021-11-19 14:02:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:27,121 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, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 228 [2021-11-19 14:02:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:27,133 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 14:02:27,134 INFO L226 Difference]: Without dead ends: 1124 [2021-11-19 14:02:27,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:27,140 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1582 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:27,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 1661 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-11-19 14:02:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2021-11-19 14:02:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 869 states have (on average 1.4349827387802072) internal successors, (1247), 884 states have internal predecessors, (1247), 211 states have call successors, (211), 43 states have call predecessors, (211), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2021-11-19 14:02:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1666 transitions. [2021-11-19 14:02:27,206 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1666 transitions. Word has length 228 [2021-11-19 14:02:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:27,207 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1666 transitions. [2021-11-19 14:02:27,207 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, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1666 transitions. [2021-11-19 14:02:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 14:02:27,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:27,213 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:27,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:27,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 14:02:27,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:27,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1498681330, now seen corresponding path program 1 times [2021-11-19 14:02:27,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:27,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637648265] [2021-11-19 14:02:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:27,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:27,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:27,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:27,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:02:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:28,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-19 14:02:29,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-19 14:02:30,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:30,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637648265] [2021-11-19 14:02:30,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637648265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:30,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1292152380] [2021-11-19 14:02:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:30,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:30,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:30,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:02:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:32,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1292152380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:32,745 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:32,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:32,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027386978] [2021-11-19 14:02:32,745 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:32,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:32,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:32,747 INFO L87 Difference]: Start difference. First operand 1124 states and 1666 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:32,814 INFO L93 Difference]: Finished difference Result 1126 states and 1667 transitions. [2021-11-19 14:02:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 229 [2021-11-19 14:02:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:32,824 INFO L225 Difference]: With dead ends: 1126 [2021-11-19 14:02:32,824 INFO L226 Difference]: Without dead ends: 1123 [2021-11-19 14:02:32,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:32,826 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1579 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:32,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 1659 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-11-19 14:02:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1123. [2021-11-19 14:02:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 869 states have (on average 1.433831990794016) internal successors, (1246), 883 states have internal predecessors, (1246), 210 states have call successors, (210), 43 states have call predecessors, (210), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2021-11-19 14:02:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1664 transitions. [2021-11-19 14:02:32,929 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1664 transitions. Word has length 229 [2021-11-19 14:02:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:32,930 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1664 transitions. [2021-11-19 14:02:32,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1664 transitions. [2021-11-19 14:02:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-19 14:02:32,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:32,935 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:32,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:33,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:33,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:33,357 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash -785816688, now seen corresponding path program 1 times [2021-11-19 14:02:33,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:33,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159280458] [2021-11-19 14:02:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:33,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:33,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:33,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:33,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:02:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-19 14:02:34,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-19 14:02:35,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:35,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159280458] [2021-11-19 14:02:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159280458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:35,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [831293942] [2021-11-19 14:02:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:35,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:35,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:35,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:35,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:02:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [831293942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:38,679 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:38,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:38,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853032068] [2021-11-19 14:02:38,679 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:38,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:38,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:38,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:38,681 INFO L87 Difference]: Start difference. First operand 1123 states and 1664 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:38,806 INFO L93 Difference]: Finished difference Result 1125 states and 1665 transitions. [2021-11-19 14:02:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 230 [2021-11-19 14:02:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:38,820 INFO L225 Difference]: With dead ends: 1125 [2021-11-19 14:02:38,820 INFO L226 Difference]: Without dead ends: 1122 [2021-11-19 14:02:38,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:38,822 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 1576 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:38,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 1657 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-19 14:02:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-19 14:02:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 869 states have (on average 1.432681242807825) internal successors, (1245), 882 states have internal predecessors, (1245), 209 states have call successors, (209), 43 states have call predecessors, (209), 43 states have return successors, (208), 203 states have call predecessors, (208), 207 states have call successors, (208) [2021-11-19 14:02:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1662 transitions. [2021-11-19 14:02:38,881 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1662 transitions. Word has length 230 [2021-11-19 14:02:38,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:38,886 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1662 transitions. [2021-11-19 14:02:38,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1662 transitions. [2021-11-19 14:02:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 14:02:38,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:38,890 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:39,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:39,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:39,299 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1409193653, now seen corresponding path program 1 times [2021-11-19 14:02:39,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:39,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671670190] [2021-11-19 14:02:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:39,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:39,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:39,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:02:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-11-19 14:02:40,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-19 14:02:41,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671670190] [2021-11-19 14:02:41,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671670190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [762173451] [2021-11-19 14:02:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:41,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:41,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:41,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:02:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-19 14:02:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [762173451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:44,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:44,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870968041] [2021-11-19 14:02:44,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:44,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:44,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:44,395 INFO L87 Difference]: Start difference. First operand 1122 states and 1662 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:44,542 INFO L93 Difference]: Finished difference Result 2188 states and 3250 transitions. [2021-11-19 14:02:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:44,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 231 [2021-11-19 14:02:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:44,560 INFO L225 Difference]: With dead ends: 2188 [2021-11-19 14:02:44,561 INFO L226 Difference]: Without dead ends: 2177 [2021-11-19 14:02:44,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:44,564 INFO L933 BasicCegarLoop]: 1846 mSDtfsCounter, 1549 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:44,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 3447 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:02:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-11-19 14:02:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 2174. [2021-11-19 14:02:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1694 states have (on average 1.4403778040141677) internal successors, (2440), 1717 states have internal predecessors, (2440), 397 states have call successors, (397), 83 states have call predecessors, (397), 82 states have return successors, (396), 386 states have call predecessors, (396), 395 states have call successors, (396) [2021-11-19 14:02:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3233 transitions. [2021-11-19 14:02:44,726 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3233 transitions. Word has length 231 [2021-11-19 14:02:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:44,727 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 3233 transitions. [2021-11-19 14:02:44,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-19 14:02:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3233 transitions. [2021-11-19 14:02:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-19 14:02:44,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:44,743 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:44,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:44,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:45,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:45,159 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1674706325, now seen corresponding path program 1 times [2021-11-19 14:02:45,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:45,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995185464] [2021-11-19 14:02:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:45,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:45,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:45,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:02:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-19 14:02:47,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-19 14:02:48,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:48,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995185464] [2021-11-19 14:02:48,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995185464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:48,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824868244] [2021-11-19 14:02:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:48,890 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:48,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:48,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:02:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-19 14:02:50,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-19 14:02:51,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824868244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:51,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:51,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:51,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779870742] [2021-11-19 14:02:51,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:51,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:51,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:51,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:51,464 INFO L87 Difference]: Start difference. First operand 2174 states and 3233 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 14:02:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:52,234 INFO L93 Difference]: Finished difference Result 4424 states and 6569 transitions. [2021-11-19 14:02:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 337 [2021-11-19 14:02:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:52,255 INFO L225 Difference]: With dead ends: 4424 [2021-11-19 14:02:52,255 INFO L226 Difference]: Without dead ends: 2287 [2021-11-19 14:02:52,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1334 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:52,266 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 137 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:52,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3161 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:02:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-11-19 14:02:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2274. [2021-11-19 14:02:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 1779 states have (on average 1.4395727937043283) internal successors, (2561), 1801 states have internal predecessors, (2561), 407 states have call successors, (407), 89 states have call predecessors, (407), 87 states have return successors, (405), 396 states have call predecessors, (405), 405 states have call successors, (405) [2021-11-19 14:02:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3373 transitions. [2021-11-19 14:02:52,407 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3373 transitions. Word has length 337 [2021-11-19 14:02:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:52,407 INFO L470 AbstractCegarLoop]: Abstraction has 2274 states and 3373 transitions. [2021-11-19 14:02:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-19 14:02:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3373 transitions. [2021-11-19 14:02:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-19 14:02:52,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:52,423 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:52,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:52,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:52,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:52,856 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash 316387060, now seen corresponding path program 1 times [2021-11-19 14:02:52,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:52,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141372362] [2021-11-19 14:02:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:52,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:52,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:52,864 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:52,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:02:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:54,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:02:55,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:02:56,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:56,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141372362] [2021-11-19 14:02:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141372362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:56,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1500524693] [2021-11-19 14:02:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:56,421 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:56,445 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:56,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:02:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-11-19 14:02:58,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:02:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1500524693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:59,051 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:59,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:02:59,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760967653] [2021-11-19 14:02:59,051 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:59,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:02:59,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:02:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:59,053 INFO L87 Difference]: Start difference. First operand 2274 states and 3373 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:02:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:59,227 INFO L93 Difference]: Finished difference Result 4492 states and 6678 transitions. [2021-11-19 14:02:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:02:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 365 [2021-11-19 14:02:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:59,248 INFO L225 Difference]: With dead ends: 4492 [2021-11-19 14:02:59,248 INFO L226 Difference]: Without dead ends: 2276 [2021-11-19 14:02:59,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:59,259 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 0 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:59,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3309 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:02:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-11-19 14:02:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2276. [2021-11-19 14:02:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 1781 states have (on average 1.4390791690061764) internal successors, (2563), 1803 states have internal predecessors, (2563), 407 states have call successors, (407), 89 states have call predecessors, (407), 87 states have return successors, (405), 396 states have call predecessors, (405), 405 states have call successors, (405) [2021-11-19 14:02:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3375 transitions. [2021-11-19 14:02:59,432 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3375 transitions. Word has length 365 [2021-11-19 14:02:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:59,434 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 3375 transitions. [2021-11-19 14:02:59,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-19 14:02:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3375 transitions. [2021-11-19 14:02:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-19 14:02:59,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:59,449 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:59,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:59,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 14:02:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:59,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash -740344142, now seen corresponding path program 1 times [2021-11-19 14:02:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:59,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883280579] [2021-11-19 14:02:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:59,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:59,866 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:59,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:03:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:01,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:03,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:03,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883280579] [2021-11-19 14:03:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883280579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:03,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1823090622] [2021-11-19 14:03:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:03,365 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:03,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:03,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:03:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:03:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:05,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:05,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1823090622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:05,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:05,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:03:05,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367256673] [2021-11-19 14:03:05,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:05,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:05,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:05,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:05,778 INFO L87 Difference]: Start difference. First operand 2276 states and 3375 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:07,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:07,969 INFO L93 Difference]: Finished difference Result 5705 states and 8620 transitions. [2021-11-19 14:03:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 365 [2021-11-19 14:03:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:08,023 INFO L225 Difference]: With dead ends: 5705 [2021-11-19 14:03:08,023 INFO L226 Difference]: Without dead ends: 3487 [2021-11-19 14:03:08,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:08,036 INFO L933 BasicCegarLoop]: 2294 mSDtfsCounter, 695 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 4023 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:08,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 4023 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:03:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2021-11-19 14:03:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2346. [2021-11-19 14:03:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 1837 states have (on average 1.437670114316821) internal successors, (2641), 1859 states have internal predecessors, (2641), 421 states have call successors, (421), 89 states have call predecessors, (421), 87 states have return successors, (419), 410 states have call predecessors, (419), 419 states have call successors, (419) [2021-11-19 14:03:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3481 transitions. [2021-11-19 14:03:08,209 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3481 transitions. Word has length 365 [2021-11-19 14:03:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:08,210 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3481 transitions. [2021-11-19 14:03:08,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3481 transitions. [2021-11-19 14:03:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-19 14:03:08,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:08,226 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:08,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:08,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:08,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:08,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1439590795, now seen corresponding path program 1 times [2021-11-19 14:03:08,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:08,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687387244] [2021-11-19 14:03:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:08,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:08,641 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:08,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:03:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:10,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:12,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687387244] [2021-11-19 14:03:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687387244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816175364] [2021-11-19 14:03:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:12,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:12,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:12,108 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:12,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:03:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:13,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:13,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:14,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816175364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:14,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:14,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 13 [2021-11-19 14:03:14,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588606579] [2021-11-19 14:03:14,563 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:03:14,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:03:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:03:14,565 INFO L87 Difference]: Start difference. First operand 2346 states and 3481 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:14,908 INFO L93 Difference]: Finished difference Result 5921 states and 8950 transitions. [2021-11-19 14:03:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:14,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 366 [2021-11-19 14:03:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:14,945 INFO L225 Difference]: With dead ends: 5921 [2021-11-19 14:03:14,945 INFO L226 Difference]: Without dead ends: 3633 [2021-11-19 14:03:14,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1461 GetRequests, 1449 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:14,959 INFO L933 BasicCegarLoop]: 2288 mSDtfsCounter, 694 mSDsluCounter, 4017 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 6305 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:14,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 6305 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-11-19 14:03:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2490. [2021-11-19 14:03:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1953 states have (on average 1.4352278545826933) internal successors, (2803), 1975 states have internal predecessors, (2803), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2021-11-19 14:03:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3699 transitions. [2021-11-19 14:03:15,242 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3699 transitions. Word has length 366 [2021-11-19 14:03:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:15,243 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 3699 transitions. [2021-11-19 14:03:15,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3699 transitions. [2021-11-19 14:03:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-19 14:03:15,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:15,259 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:15,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:15,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:15,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash -847738022, now seen corresponding path program 1 times [2021-11-19 14:03:15,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:15,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458720639] [2021-11-19 14:03:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:15,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:15,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:15,675 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:15,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:03:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:17,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:19,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:19,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458720639] [2021-11-19 14:03:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458720639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:19,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [75301390] [2021-11-19 14:03:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:19,001 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:19,002 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:19,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:03:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:21,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [75301390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:21,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:21,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-19 14:03:21,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088568788] [2021-11-19 14:03:21,497 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:21,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:21,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:03:21,500 INFO L87 Difference]: Start difference. First operand 2490 states and 3699 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:23,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:24,671 INFO L93 Difference]: Finished difference Result 6739 states and 10259 transitions. [2021-11-19 14:03:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:03:24,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 367 [2021-11-19 14:03:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:24,717 INFO L225 Difference]: With dead ends: 6739 [2021-11-19 14:03:24,718 INFO L226 Difference]: Without dead ends: 4307 [2021-11-19 14:03:24,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1466 GetRequests, 1452 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:03:24,733 INFO L933 BasicCegarLoop]: 2547 mSDtfsCounter, 1736 mSDsluCounter, 6764 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1892 SdHoareTripleChecker+Valid, 9311 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:24,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1892 Valid, 9311 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 14:03:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4307 states. [2021-11-19 14:03:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4307 to 2494. [2021-11-19 14:03:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1957 states have (on average 1.4343382728666325) internal successors, (2807), 1979 states have internal predecessors, (2807), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2021-11-19 14:03:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3703 transitions. [2021-11-19 14:03:25,050 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3703 transitions. Word has length 367 [2021-11-19 14:03:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:25,051 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 3703 transitions. [2021-11-19 14:03:25,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3703 transitions. [2021-11-19 14:03:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-19 14:03:25,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:25,064 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:25,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:25,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:25,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:25,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2016280764, now seen corresponding path program 1 times [2021-11-19 14:03:25,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:25,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510975483] [2021-11-19 14:03:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:25,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:25,478 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:25,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:03:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:28,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:29,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:29,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510975483] [2021-11-19 14:03:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510975483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:29,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64300085] [2021-11-19 14:03:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:29,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:29,584 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:29,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:03:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:03:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:31,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:32,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64300085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:32,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:03:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963218795] [2021-11-19 14:03:32,322 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:32,325 INFO L87 Difference]: Start difference. First operand 2494 states and 3703 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:32,771 INFO L93 Difference]: Finished difference Result 4932 states and 7338 transitions. [2021-11-19 14:03:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 386 [2021-11-19 14:03:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:32,794 INFO L225 Difference]: With dead ends: 4932 [2021-11-19 14:03:32,795 INFO L226 Difference]: Without dead ends: 2496 [2021-11-19 14:03:32,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 1530 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:32,808 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 0 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:32,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3309 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:03:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-11-19 14:03:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2021-11-19 14:03:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 1959 states have (on average 1.4338948443083206) internal successors, (2809), 1981 states have internal predecessors, (2809), 449 states have call successors, (449), 89 states have call predecessors, (449), 87 states have return successors, (447), 438 states have call predecessors, (447), 447 states have call successors, (447) [2021-11-19 14:03:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3705 transitions. [2021-11-19 14:03:32,970 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3705 transitions. Word has length 386 [2021-11-19 14:03:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:32,971 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3705 transitions. [2021-11-19 14:03:32,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 14:03:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3705 transitions. [2021-11-19 14:03:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-19 14:03:32,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:32,983 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:33,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:33,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:33,396 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1939379966, now seen corresponding path program 1 times [2021-11-19 14:03:33,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:33,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941856187] [2021-11-19 14:03:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:33,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:33,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:33,400 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:33,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:03:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:35,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:37,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:37,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941856187] [2021-11-19 14:03:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941856187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:37,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998715593] [2021-11-19 14:03:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:37,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:37,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 14:03:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:03:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:39,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:40,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998715593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:40,247 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:40,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 13 [2021-11-19 14:03:40,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585011512] [2021-11-19 14:03:40,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:40,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:03:40,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:03:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:03:40,250 INFO L87 Difference]: Start difference. First operand 2496 states and 3705 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:03:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:41,340 INFO L93 Difference]: Finished difference Result 9117 states and 13968 transitions. [2021-11-19 14:03:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 386 [2021-11-19 14:03:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:41,388 INFO L225 Difference]: With dead ends: 9117 [2021-11-19 14:03:41,389 INFO L226 Difference]: Without dead ends: 6679 [2021-11-19 14:03:41,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1530 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:03:41,401 INFO L933 BasicCegarLoop]: 3046 mSDtfsCounter, 2084 mSDsluCounter, 4622 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2304 SdHoareTripleChecker+Valid, 7668 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:41,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2304 Valid, 7668 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:03:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2021-11-19 14:03:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 2634. [2021-11-19 14:03:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2067 states have (on average 1.4441219158200291) internal successors, (2985), 2089 states have internal predecessors, (2985), 479 states have call successors, (479), 89 states have call predecessors, (479), 87 states have return successors, (477), 468 states have call predecessors, (477), 477 states have call successors, (477) [2021-11-19 14:03:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3941 transitions. [2021-11-19 14:03:41,698 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3941 transitions. Word has length 386 [2021-11-19 14:03:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 2634 states and 3941 transitions. [2021-11-19 14:03:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:03:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3941 transitions. [2021-11-19 14:03:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-19 14:03:41,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:41,712 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:41,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:41,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 14:03:42,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:42,124 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1960807295, now seen corresponding path program 1 times [2021-11-19 14:03:42,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:42,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256141390] [2021-11-19 14:03:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:42,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:42,130 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:42,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:03:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:44,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:46,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:46,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256141390] [2021-11-19 14:03:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256141390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:46,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261590934] [2021-11-19 14:03:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:46,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:46,265 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:03:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:03:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261590934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:49,530 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:49,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-19 14:03:49,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747339680] [2021-11-19 14:03:49,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:49,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:49,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:03:49,533 INFO L87 Difference]: Start difference. First operand 2634 states and 3941 transitions. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:03:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:50,511 INFO L93 Difference]: Finished difference Result 6698 states and 10220 transitions. [2021-11-19 14:03:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:50,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 387 [2021-11-19 14:03:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:50,536 INFO L225 Difference]: With dead ends: 6698 [2021-11-19 14:03:50,537 INFO L226 Difference]: Without dead ends: 4122 [2021-11-19 14:03:50,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 1532 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:03:50,551 INFO L933 BasicCegarLoop]: 2136 mSDtfsCounter, 1660 mSDsluCounter, 4229 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:50,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1758 Valid, 6365 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:03:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-11-19 14:03:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 2638. [2021-11-19 14:03:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2071 states have (on average 1.4432641236117818) internal successors, (2989), 2093 states have internal predecessors, (2989), 479 states have call successors, (479), 89 states have call predecessors, (479), 87 states have return successors, (477), 468 states have call predecessors, (477), 477 states have call successors, (477) [2021-11-19 14:03:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3945 transitions. [2021-11-19 14:03:50,879 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3945 transitions. Word has length 387 [2021-11-19 14:03:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 3945 transitions. [2021-11-19 14:03:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-19 14:03:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3945 transitions. [2021-11-19 14:03:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-19 14:03:50,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:50,906 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:50,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:51,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:51,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:51,328 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1927993282, now seen corresponding path program 1 times [2021-11-19 14:03:51,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:51,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970608994] [2021-11-19 14:03:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:51,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:51,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:51,332 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:03:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:03:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 14:03:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-19 14:03:55,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:55,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970608994] [2021-11-19 14:03:55,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970608994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:55,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803428393] [2021-11-19 14:03:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:55,373 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:55,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:03:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-11-19 14:03:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:03:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803428393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:59,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131449841] [2021-11-19 14:03:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:59,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:03:59,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:59,154 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:03:59,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 14:04:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 2199 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:04:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-11-19 14:04:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2021-11-19 14:04:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131449841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:02,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:04:02,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 4, 4, 4] total 15 [2021-11-19 14:04:02,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460007067] [2021-11-19 14:04:02,526 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:04:02,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:04:02,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:04:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:04:02,529 INFO L87 Difference]: Start difference. First operand 2638 states and 3945 transitions. Second operand has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) [2021-11-19 14:04:04,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:06,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:22,140 INFO L93 Difference]: Finished difference Result 18215 states and 27318 transitions. [2021-11-19 14:04:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 14:04:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) Word has length 389 [2021-11-19 14:04:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:22,211 INFO L225 Difference]: With dead ends: 18215 [2021-11-19 14:04:22,211 INFO L226 Difference]: Without dead ends: 15606 [2021-11-19 14:04:22,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2356 GetRequests, 2316 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 14:04:22,227 INFO L933 BasicCegarLoop]: 3995 mSDtfsCounter, 8611 mSDsluCounter, 30780 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 834 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8626 SdHoareTripleChecker+Valid, 34775 SdHoareTripleChecker+Invalid, 4399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:22,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8626 Valid, 34775 Invalid, 4399 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [834 Valid, 3563 Invalid, 2 Unknown, 0 Unchecked, 17.3s Time] [2021-11-19 14:04:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2021-11-19 14:04:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 15473. [2021-11-19 14:04:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15473 states, 12199 states have (on average 1.450610705795557) internal successors, (17696), 12342 states have internal predecessors, (17696), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2703 states have call predecessors, (2773), 2773 states have call successors, (2773) [2021-11-19 14:04:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15473 states to 15473 states and 23244 transitions. [2021-11-19 14:04:23,588 INFO L78 Accepts]: Start accepts. Automaton has 15473 states and 23244 transitions. Word has length 389 [2021-11-19 14:04:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:23,589 INFO L470 AbstractCegarLoop]: Abstraction has 15473 states and 23244 transitions. [2021-11-19 14:04:23,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 34.53846153846154) internal successors, (449), 15 states have internal predecessors, (449), 6 states have call successors, (81), 3 states have call predecessors, (81), 6 states have return successors, (82), 6 states have call predecessors, (82), 6 states have call successors, (82) [2021-11-19 14:04:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15473 states and 23244 transitions. [2021-11-19 14:04:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-11-19 14:04:23,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:23,633 INFO L514 BasicCegarLoop]: trace histogram [14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:23,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:24,058 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forcibly destroying the process [2021-11-19 14:04:24,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:24,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:24,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:04:24,262 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1836471525, now seen corresponding path program 1 times [2021-11-19 14:04:24,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:24,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159672647] [2021-11-19 14:04:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:24,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:24,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:24,265 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:24,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:04:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:04:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-19 14:04:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:04:28,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:28,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159672647] [2021-11-19 14:04:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159672647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:28,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401199867] [2021-11-19 14:04:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:28,271 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:28,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:28,272 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:04:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:04:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-19 14:04:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-19 14:04:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401199867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:30,652 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:30,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 15 [2021-11-19 14:04:30,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371501158] [2021-11-19 14:04:30,653 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:30,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:04:30,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:04:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:04:30,655 INFO L87 Difference]: Start difference. First operand 15473 states and 23244 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-19 14:04:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:32,513 INFO L93 Difference]: Finished difference Result 40095 states and 60434 transitions. [2021-11-19 14:04:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:04:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 396 [2021-11-19 14:04:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:32,668 INFO L225 Difference]: With dead ends: 40095 [2021-11-19 14:04:32,668 INFO L226 Difference]: Without dead ends: 32334 [2021-11-19 14:04:32,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1568 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:04:32,703 INFO L933 BasicCegarLoop]: 2145 mSDtfsCounter, 1953 mSDsluCounter, 3498 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:32,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1953 Valid, 5643 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:04:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2021-11-19 14:04:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 15479. [2021-11-19 14:04:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15479 states, 12205 states have (on average 1.450389184760344) internal successors, (17702), 12350 states have internal predecessors, (17702), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2021-11-19 14:04:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15479 states to 15479 states and 23250 transitions. [2021-11-19 14:04:34,660 INFO L78 Accepts]: Start accepts. Automaton has 15479 states and 23250 transitions. Word has length 396 [2021-11-19 14:04:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:34,661 INFO L470 AbstractCegarLoop]: Abstraction has 15479 states and 23250 transitions. [2021-11-19 14:04:34,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-11-19 14:04:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15479 states and 23250 transitions. [2021-11-19 14:04:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-19 14:04:34,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:34,712 INFO L514 BasicCegarLoop]: trace histogram [14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:34,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:34,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:35,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:04:35,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -722094474, now seen corresponding path program 1 times [2021-11-19 14:04:35,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:35,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762490633] [2021-11-19 14:04:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:35,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:35,130 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:35,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:04:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:04:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-19 14:04:37,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:04:39,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:39,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762490633] [2021-11-19 14:04:39,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762490633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:39,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852387291] [2021-11-19 14:04:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:39,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:39,208 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:04:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:04:41,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-19 14:04:42,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:04:43,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852387291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:43,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119454479] [2021-11-19 14:04:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:43,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:04:43,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:04:43,891 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:04:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 14:04:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 2227 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:04:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 214 proven. 3 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-19 14:04:46,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-11-19 14:04:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119454479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:48,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:04:48,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-19 14:04:48,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502867910] [2021-11-19 14:04:48,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:04:48,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:04:48,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:04:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:04:48,089 INFO L87 Difference]: Start difference. First operand 15479 states and 23250 transitions. Second operand has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) [2021-11-19 14:04:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:50,223 INFO L93 Difference]: Finished difference Result 31041 states and 46618 transitions. [2021-11-19 14:04:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:04:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) Word has length 397 [2021-11-19 14:04:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:50,301 INFO L225 Difference]: With dead ends: 31041 [2021-11-19 14:04:50,301 INFO L226 Difference]: Without dead ends: 15588 [2021-11-19 14:04:50,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2381 GetRequests, 2358 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:04:50,347 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 34 mSDsluCounter, 11520 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13170 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:50,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 13170 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:04:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15588 states. [2021-11-19 14:04:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15588 to 15480. [2021-11-19 14:04:51,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15480 states, 12206 states have (on average 1.450352285761101) internal successors, (17703), 12351 states have internal predecessors, (17703), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2021-11-19 14:04:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15480 states to 15480 states and 23251 transitions. [2021-11-19 14:04:51,833 INFO L78 Accepts]: Start accepts. Automaton has 15480 states and 23251 transitions. Word has length 397 [2021-11-19 14:04:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 15480 states and 23251 transitions. [2021-11-19 14:04:51,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 13.294117647058824) internal successors, (226), 20 states have internal predecessors, (226), 5 states have call successors, (53), 2 states have call predecessors, (53), 7 states have return successors, (55), 5 states have call predecessors, (55), 5 states have call successors, (55) [2021-11-19 14:04:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 15480 states and 23251 transitions. [2021-11-19 14:04:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-19 14:04:51,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:51,867 INFO L514 BasicCegarLoop]: trace histogram [21, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:51,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:52,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:52,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:52,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:52,481 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash 664039643, now seen corresponding path program 2 times [2021-11-19 14:04:52,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:52,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272185480] [2021-11-19 14:04:52,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:04:52,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:52,486 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:52,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:05:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:05:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:05:16,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:05:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 256 proven. 6 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2021-11-19 14:05:17,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2021-11-19 14:05:19,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:19,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272185480] [2021-11-19 14:05:19,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272185480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:05:19,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624156714] [2021-11-19 14:05:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:05:19,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:19,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:05:19,909 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:05:19,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-19 14:06:37,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:06:37,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:06:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:06:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 256 proven. 6 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2021-11-19 14:06:39,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2021-11-19 14:06:40,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624156714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:40,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324271329] [2021-11-19 14:06:40,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:06:40,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:06:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:06:40,607 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:06:40,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 14:07:29,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:07:29,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:07:29,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:07:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 374 proven. 6 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2021-11-19 14:07:31,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 22 proven. 116 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2021-11-19 14:07:33,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324271329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:33,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:07:33,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 24 [2021-11-19 14:07:33,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382808625] [2021-11-19 14:07:33,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:07:33,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:07:33,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:07:33,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:07:33,680 INFO L87 Difference]: Start difference. First operand 15480 states and 23251 transitions. Second operand has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-19 14:07:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:36,891 INFO L93 Difference]: Finished difference Result 31079 states and 46668 transitions. [2021-11-19 14:07:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:07:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) Word has length 404 [2021-11-19 14:07:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:36,964 INFO L225 Difference]: With dead ends: 31079 [2021-11-19 14:07:36,965 INFO L226 Difference]: Without dead ends: 15625 [2021-11-19 14:07:37,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2425 GetRequests, 2396 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-11-19 14:07:37,011 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 56 mSDsluCounter, 18101 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 19751 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:37,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 19751 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:07:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15625 states. [2021-11-19 14:07:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15625 to 15481. [2021-11-19 14:07:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15481 states, 12207 states have (on average 1.4503153928074055) internal successors, (17704), 12352 states have internal predecessors, (17704), 2775 states have call successors, (2775), 505 states have call predecessors, (2775), 498 states have return successors, (2773), 2701 states have call predecessors, (2773), 2773 states have call successors, (2773) [2021-11-19 14:07:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15481 states to 15481 states and 23252 transitions. [2021-11-19 14:07:38,456 INFO L78 Accepts]: Start accepts. Automaton has 15481 states and 23252 transitions. Word has length 404 [2021-11-19 14:07:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:38,456 INFO L470 AbstractCegarLoop]: Abstraction has 15481 states and 23252 transitions. [2021-11-19 14:07:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 11.047619047619047) internal successors, (232), 24 states have internal predecessors, (232), 5 states have call successors, (54), 2 states have call predecessors, (54), 8 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-19 14:07:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15481 states and 23252 transitions. [2021-11-19 14:07:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-19 14:07:38,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:38,477 INFO L514 BasicCegarLoop]: trace histogram [28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:38,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:38,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-19 14:07:38,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-19 14:07:39,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:39,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1123628758, now seen corresponding path program 3 times [2021-11-19 14:07:39,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:39,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333366723] [2021-11-19 14:07:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:07:39,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:39,082 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:39,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:08:45,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:08:45,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:08:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:08:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:47,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:47,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:08:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:08:47,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 42 [2021-11-19 14:08:49,030 INFO L354 Elim1Store]: treesize reduction 264, result has 25.2 percent of original size [2021-11-19 14:08:49,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1426 treesize of output 1086 [2021-11-19 14:08:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-11-19 14:08:49,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:03,615 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-19 14:09:04,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172528836280269 treesize of output 1 [2021-11-19 14:09:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2021-11-19 14:09:05,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:05,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333366723] [2021-11-19 14:09:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333366723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:05,049 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 5] imperfect sequences [] total 13 [2021-11-19 14:09:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961199912] [2021-11-19 14:09:05,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:05,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:09:05,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:09:05,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:09:05,051 INFO L87 Difference]: Start difference. First operand 15481 states and 23252 transitions. Second operand has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 12 states have internal predecessors, (253), 5 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 6 states have call predecessors, (41), 5 states have call successors, (41) [2021-11-19 14:09:07,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:11,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:15,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:18,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:20,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:23,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:24,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:33,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:34,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:37,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:40,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:42,793 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:44,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:46,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:48,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:50,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:54,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:56,013 INFO L93 Difference]: Finished difference Result 33354 states and 50387 transitions. [2021-11-19 14:09:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:09:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 12 states have internal predecessors, (253), 5 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 6 states have call predecessors, (41), 5 states have call successors, (41) Word has length 411 [2021-11-19 14:09:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:56,135 INFO L225 Difference]: With dead ends: 33354 [2021-11-19 14:09:56,136 INFO L226 Difference]: Without dead ends: 25557 [2021-11-19 14:09:56,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:09:56,165 INFO L933 BasicCegarLoop]: 2045 mSDtfsCounter, 2206 mSDsluCounter, 17187 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 166 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 19232 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 47.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:56,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2215 Valid, 19232 Invalid, 1775 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [166 Valid, 1198 Invalid, 7 Unknown, 404 Unchecked, 47.8s Time] [2021-11-19 14:09:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25557 states. [2021-11-19 14:09:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25557 to 23075. [2021-11-19 14:09:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23075 states, 18199 states have (on average 1.4510687400406617) internal successors, (26408), 18424 states have internal predecessors, (26408), 4125 states have call successors, (4125), 757 states have call predecessors, (4125), 750 states have return successors, (4123), 4007 states have call predecessors, (4123), 4123 states have call successors, (4123) [2021-11-19 14:09:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23075 states to 23075 states and 34656 transitions. [2021-11-19 14:09:58,259 INFO L78 Accepts]: Start accepts. Automaton has 23075 states and 34656 transitions. Word has length 411 [2021-11-19 14:09:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:58,260 INFO L470 AbstractCegarLoop]: Abstraction has 23075 states and 34656 transitions. [2021-11-19 14:09:58,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.46153846153846) internal successors, (253), 12 states have internal predecessors, (253), 5 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (41), 6 states have call predecessors, (41), 5 states have call successors, (41) [2021-11-19 14:09:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23075 states and 34656 transitions. [2021-11-19 14:09:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-19 14:09:58,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:58,287 INFO L514 BasicCegarLoop]: trace histogram [28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:58,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:58,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:58,513 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 226235480, now seen corresponding path program 1 times [2021-11-19 14:09:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:58,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642687026] [2021-11-19 14:09:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:58,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:58,516 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:58,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:09:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 473 proven. 10 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:10:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 31 proven. 165 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:10:03,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:03,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642687026] [2021-11-19 14:10:03,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642687026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:03,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907090002] [2021-11-19 14:10:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:03,749 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:03,750 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:03,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:10:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:10:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 473 proven. 10 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:10:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 31 proven. 165 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:10:09,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907090002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:09,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606334778] [2021-11-19 14:10:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:09,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:10:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:10:09,021 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:10:09,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 14:10:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 473 proven. 10 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:10:11,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 31 proven. 165 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:10:14,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606334778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:14,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:10:14,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-19 14:10:14,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655076344] [2021-11-19 14:10:14,337 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:10:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 14:10:14,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 14:10:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-11-19 14:10:14,340 INFO L87 Difference]: Start difference. First operand 23075 states and 34656 transitions. Second operand has 26 states, 23 states have (on average 10.08695652173913) internal successors, (232), 26 states have internal predecessors, (232), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) [2021-11-19 14:10:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:19,388 INFO L93 Difference]: Finished difference Result 46398 states and 69651 transitions. [2021-11-19 14:10:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:10:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 10.08695652173913) internal successors, (232), 26 states have internal predecessors, (232), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) Word has length 411 [2021-11-19 14:10:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:19,499 INFO L225 Difference]: With dead ends: 46398 [2021-11-19 14:10:19,500 INFO L226 Difference]: Without dead ends: 23354 [2021-11-19 14:10:19,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2470 GetRequests, 2436 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 14:10:19,571 INFO L933 BasicCegarLoop]: 1650 mSDtfsCounter, 69 mSDsluCounter, 21392 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 23042 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:19,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 23042 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:10:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23354 states. [2021-11-19 14:10:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23354 to 23084. [2021-11-19 14:10:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23084 states, 18207 states have (on average 1.4509254682265063) internal successors, (26417), 18432 states have internal predecessors, (26417), 4125 states have call successors, (4125), 758 states have call predecessors, (4125), 751 states have return successors, (4123), 4007 states have call predecessors, (4123), 4123 states have call successors, (4123) [2021-11-19 14:10:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23084 states to 23084 states and 34665 transitions. [2021-11-19 14:10:21,830 INFO L78 Accepts]: Start accepts. Automaton has 23084 states and 34665 transitions. Word has length 411 [2021-11-19 14:10:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:21,831 INFO L470 AbstractCegarLoop]: Abstraction has 23084 states and 34665 transitions. [2021-11-19 14:10:21,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 10.08695652173913) internal successors, (232), 26 states have internal predecessors, (232), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) [2021-11-19 14:10:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23084 states and 34665 transitions. [2021-11-19 14:10:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-19 14:10:21,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:21,880 INFO L514 BasicCegarLoop]: trace histogram [29, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:21,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:22,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:22,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:22,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:22,497 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1354911247, now seen corresponding path program 2 times [2021-11-19 14:10:22,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:22,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60001935] [2021-11-19 14:10:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:10:22,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:22,503 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:22,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:10:50,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:10:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:10:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:10:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 503 proven. 15 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:10:51,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 36 proven. 195 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:10:54,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:54,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60001935] [2021-11-19 14:10:54,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60001935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:54,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627346768] [2021-11-19 14:10:54,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:10:54,097 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:54,098 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:54,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-19 14:12:12,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:12:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:12:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 503 proven. 15 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:12:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 36 proven. 195 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:12:15,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627346768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:12:15,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724020605] [2021-11-19 14:12:15,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:12:15,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:12:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:12:15,436 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:12:15,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-19 14:12:59,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:12:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:12:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:12:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:13:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 503 proven. 15 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-11-19 14:13:00,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:13:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 36 proven. 195 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2021-11-19 14:13:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724020605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:13:03,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:13:03,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 29 [2021-11-19 14:13:03,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892485729] [2021-11-19 14:13:03,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:13:03,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 14:13:03,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:13:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 14:13:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:13:03,847 INFO L87 Difference]: Start difference. First operand 23084 states and 34665 transitions. Second operand has 29 states, 26 states have (on average 9.038461538461538) internal successors, (235), 29 states have internal predecessors, (235), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) [2021-11-19 14:13:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:09,993 INFO L93 Difference]: Finished difference Result 46448 states and 69709 transitions. [2021-11-19 14:13:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 14:13:09,995 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 9.038461538461538) internal successors, (235), 29 states have internal predecessors, (235), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) Word has length 412 [2021-11-19 14:13:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:10,085 INFO L225 Difference]: With dead ends: 46448 [2021-11-19 14:13:10,085 INFO L226 Difference]: Without dead ends: 23409 [2021-11-19 14:13:10,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2478 GetRequests, 2439 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 14:13:10,147 INFO L933 BasicCegarLoop]: 1653 mSDtfsCounter, 97 mSDsluCounter, 24723 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 26376 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:10,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 26376 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 14:13:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23409 states. [2021-11-19 14:13:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23409 to 23085. [2021-11-19 14:13:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23085 states, 18208 states have (on average 1.4509007029876977) internal successors, (26418), 18433 states have internal predecessors, (26418), 4125 states have call successors, (4125), 758 states have call predecessors, (4125), 751 states have return successors, (4123), 4007 states have call predecessors, (4123), 4123 states have call successors, (4123) [2021-11-19 14:13:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23085 states to 23085 states and 34666 transitions. [2021-11-19 14:13:12,057 INFO L78 Accepts]: Start accepts. Automaton has 23085 states and 34666 transitions. Word has length 412 [2021-11-19 14:13:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:12,058 INFO L470 AbstractCegarLoop]: Abstraction has 23085 states and 34666 transitions. [2021-11-19 14:13:12,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 9.038461538461538) internal successors, (235), 29 states have internal predecessors, (235), 5 states have call successors, (52), 2 states have call predecessors, (52), 7 states have return successors, (54), 5 states have call predecessors, (54), 5 states have call successors, (54) [2021-11-19 14:13:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 23085 states and 34666 transitions. [2021-11-19 14:13:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-11-19 14:13:12,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:12,080 INFO L514 BasicCegarLoop]: trace histogram [30, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:13:12,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:12,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:12,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:13:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:13:12,694 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:13:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1169147768, now seen corresponding path program 3 times [2021-11-19 14:13:12,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:13:12,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082956816] [2021-11-19 14:13:12,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:13:12,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:13:12,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:13:12,697 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:13:12,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ba08319-6ae4-4c41-ae81-49ad1258f603/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process