./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array2_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array2_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:34:13,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:34:13,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:34:13,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:34:13,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:34:13,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:34:13,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:34:13,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:34:13,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:34:13,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:34:13,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:34:13,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:34:13,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:34:13,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:34:13,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:34:13,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:34:13,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:34:13,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:34:13,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:34:13,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:34:13,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:34:13,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:34:13,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:34:13,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:34:13,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:34:13,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:34:13,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:34:13,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:34:13,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:34:13,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:34:13,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:34:13,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:34:13,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:34:13,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:34:13,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:34:13,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:34:13,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:34:13,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:34:13,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:34:13,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:34:13,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:34:13,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:34:13,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:34:13,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:34:13,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:34:13,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:34:13,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:34:13,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:34:13,873 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:34:13,873 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:34:13,874 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:34:13,874 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:34:13,875 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:34:13,875 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:34:13,876 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:34:13,876 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:34:13,876 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:34:13,876 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:34:13,877 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:34:13,877 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:34:13,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:34:13,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:34:13,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:34:13,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:34:13,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:34:13,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:34:13,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:34:13,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:34:13,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:34:13,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:34:13,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:34:13,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:34:13,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:34:13,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:34:13,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:34:13,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:34:13,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:34:13,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:34:13,884 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:34:13,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:34:13,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:34:13,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:34:13,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:34:13,885 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_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 [2021-11-25 19:34:14,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:34:14,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:34:14,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:34:14,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:34:14,184 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:34:14,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-25 19:34:14,277 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/1a94f4fba/e254af2dee394aeb9b17b4c878376dd4/FLAG7a826a65c [2021-11-25 19:34:14,704 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:34:14,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-25 19:34:14,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/1a94f4fba/e254af2dee394aeb9b17b4c878376dd4/FLAG7a826a65c [2021-11-25 19:34:15,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/1a94f4fba/e254af2dee394aeb9b17b4c878376dd4 [2021-11-25 19:34:15,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:34:15,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:34:15,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:34:15,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:34:15,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:34:15,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5315e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15, skipping insertion in model container [2021-11-25 19:34:15,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:34:15,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:34:15,316 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_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-25 19:34:15,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:34:15,343 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:34:15,354 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_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-25 19:34:15,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:34:15,376 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:34:15,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15 WrapperNode [2021-11-25 19:34:15,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:34:15,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:34:15,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:34:15,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:34:15,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,411 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2021-11-25 19:34:15,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:34:15,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:34:15,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:34:15,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:34:15,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:34:15,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:34:15,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:34:15,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:34:15,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (1/1) ... [2021-11-25 19:34:15,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:34:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:15,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:34:15,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:34:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:34:15,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:34:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:34:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:34:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:34:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:34:15,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:34:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:34:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:34:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:34:15,573 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:34:15,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:34:15,724 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:34:15,749 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:34:15,749 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:34:15,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:34:15 BoogieIcfgContainer [2021-11-25 19:34:15,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:34:15,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:34:15,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:34:15,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:34:15,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:34:15" (1/3) ... [2021-11-25 19:34:15,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f608e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:34:15, skipping insertion in model container [2021-11-25 19:34:15,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:15" (2/3) ... [2021-11-25 19:34:15,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f608e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:34:15, skipping insertion in model container [2021-11-25 19:34:15,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:34:15" (3/3) ... [2021-11-25 19:34:15,769 INFO L111 eAbstractionObserver]: Analyzing ICFG array2_pattern.c [2021-11-25 19:34:15,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:34:15,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:34:15,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:34:15,834 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 [2021-11-25 19:34:15,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:34:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:34:15,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:15,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:15,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -348000308, now seen corresponding path program 1 times [2021-11-25 19:34:15,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184492084] [2021-11-25 19:34:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:15,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:16,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184492084] [2021-11-25 19:34:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184492084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:16,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:34:16,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785346266] [2021-11-25 19:34:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:16,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:34:16,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:34:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:34:16,068 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:34:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:16,100 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-25 19:34:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:34:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 19:34:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:16,113 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:34:16,114 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:34:16,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:34:16,120 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:16,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:34:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:34:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 19:34:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-25 19:34:16,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-25 19:34:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:16,173 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-25 19:34:16,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:34:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-25 19:34:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:34:16,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:16,176 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:16,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:34:16,176 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1400754714, now seen corresponding path program 1 times [2021-11-25 19:34:16,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582987177] [2021-11-25 19:34:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:16,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:16,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:34:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126426147] [2021-11-25 19:34:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:16,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:16,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:16,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:34:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:34:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:34:16,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:16,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582987177] [2021-11-25 19:34:16,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:34:16,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126426147] [2021-11-25 19:34:16,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126426147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:16,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:16,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:34:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40836108] [2021-11-25 19:34:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:16,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:34:16,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:34:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:34:16,505 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:16,563 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-25 19:34:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:34:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 19:34:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:16,564 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:34:16,564 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:34:16,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:34:16,567 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:16,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:34:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:34:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 19:34:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 19:34:16,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2021-11-25 19:34:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:16,588 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 19:34:16,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 19:34:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:34:16,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:16,590 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:16,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:16,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 473487722, now seen corresponding path program 1 times [2021-11-25 19:34:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113351337] [2021-11-25 19:34:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:16,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:16,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:34:16,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111805477] [2021-11-25 19:34:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:16,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:16,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:16,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:16,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:34:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:34:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:17,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:17,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113351337] [2021-11-25 19:34:17,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:34:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111805477] [2021-11-25 19:34:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111805477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:17,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:34:17,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860533261] [2021-11-25 19:34:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:34:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:34:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:34:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:34:17,089 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:17,176 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-25 19:34:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:34:17,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-25 19:34:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:17,178 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:34:17,178 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:34:17,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:34:17,185 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:17,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:34:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:34:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 19:34:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-25 19:34:17,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2021-11-25 19:34:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:17,195 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-25 19:34:17,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-25 19:34:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:34:17,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:17,197 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:17,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:17,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 19:34:17,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 199414858, now seen corresponding path program 1 times [2021-11-25 19:34:17,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:34:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567843828] [2021-11-25 19:34:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:34:17,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:34:17,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469705409] [2021-11-25 19:34:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:17,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:17,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:17,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:34:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 19:34:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:17,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 19:34:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:17,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 19:34:17,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 19:34:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:34:17,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 19:34:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 160 [2021-11-25 19:34:18,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 152 [2021-11-25 19:34:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 136 [2021-11-25 19:34:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2021-11-25 19:34:18,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:34:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 42 [2021-11-25 19:34:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:18,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 14 [2021-11-25 19:34:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:18,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:19,193 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (+ (* |c_ULTIMATE.start_main_~index~0#1| 4294967295) 4294967295 c_~ARR_SIZE~0) 4294967296))) (and (or (forall ((v_ArrVal_107 (Array Int Int)) (v_ArrVal_104 (Array Int Int))) (= (let ((.cse0 (let ((.cse3 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* (mod (+ (* |c_ULTIMATE.start_main_~index~0#1| 4294967295) 4294967295 c_~ARR_SIZE~0) 4294967296) 4)))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_107) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse3 (+ (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~index~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_104) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse3)))))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |c_ULTIMATE.start_main_~index~0#1| 4)))) (store .cse1 .cse2 (+ (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~index~0#1|) (select .cse1 .cse2))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0)) (< 2147483647 .cse4)) (or (<= .cse4 2147483647) (forall ((v_ArrVal_107 (Array Int Int)) (v_ArrVal_104 (Array Int Int))) (= (let ((.cse7 (let ((.cse8 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (- 17179869184) (* (mod (+ (* |c_ULTIMATE.start_main_~index~0#1| 4294967295) 4294967295 c_~ARR_SIZE~0) 4294967296) 4)))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_107) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse8 (+ (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~index~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_104) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse8)))))) (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* |c_ULTIMATE.start_main_~index~0#1| 4)))) (store .cse5 .cse6 (+ (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~index~0#1|) (select .cse5 .cse6))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse7) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)) 0))))) is different from false [2021-11-25 19:34:23,903 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 19:34:23,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:34:23,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567843828] [2021-11-25 19:34:23,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:34:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469705409] [2021-11-25 19:34:23,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-25 19:34:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668406927] [2021-11-25 19:34:23,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-25 19:34:23,931 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:34:23,931 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:34:23,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:34:23,941 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:34:23,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:34:23,975 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:267) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 45 more [2021-11-25 19:34:23,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:23,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-25 19:34:23,982 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-25 19:34:23,983 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-25 19:34:23,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:34:24,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:24,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:24,214 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-25 19:34:24,216 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:34:24,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:34:24 BoogieIcfgContainer [2021-11-25 19:34:24,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:34:24,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:34:24,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:34:24,231 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:34:24,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:34:15" (3/4) ... [2021-11-25 19:34:24,236 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:34:24,236 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:34:24,237 INFO L158 Benchmark]: Toolchain (without parser) took 9126.53ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 62.1MB in the beginning and 56.8MB in the end (delta: 5.3MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. [2021-11-25 19:34:24,237 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:34:24,238 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.45ms. Allocated memory is still 104.9MB. Free memory was 61.9MB in the beginning and 78.4MB in the end (delta: -16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:34:24,238 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.63ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:34:24,238 INFO L158 Benchmark]: Boogie Preprocessor took 26.61ms. Allocated memory is still 104.9MB. Free memory was 76.5MB in the beginning and 75.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:34:24,239 INFO L158 Benchmark]: RCFGBuilder took 312.67ms. Allocated memory is still 104.9MB. Free memory was 75.4MB in the beginning and 63.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:34:24,239 INFO L158 Benchmark]: TraceAbstraction took 8477.08ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 63.0MB in the beginning and 56.8MB in the end (delta: 6.2MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2021-11-25 19:34:24,239 INFO L158 Benchmark]: Witness Printer took 5.29ms. Allocated memory is still 125.8MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:34:24,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.45ms. Allocated memory is still 104.9MB. Free memory was 61.9MB in the beginning and 78.4MB in the end (delta: -16.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.63ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.61ms. Allocated memory is still 104.9MB. Free memory was 76.5MB in the beginning and 75.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 312.67ms. Allocated memory is still 104.9MB. Free memory was 75.4MB in the beginning and 63.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8477.08ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 63.0MB in the beginning and 56.8MB in the end (delta: 6.2MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. * Witness Printer took 5.29ms. Allocated memory is still 125.8MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 30]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L34] signed long long ARR_SIZE ; [L38] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L39] CALL assume_abort_if_not(ARR_SIZE > 0) [L28] COND FALSE !(!cond) [L39] RET assume_abort_if_not(ARR_SIZE > 0) [L41] int array1[ARR_SIZE] ; [L42] int array2[ARR_SIZE] ; [L43] int count = 0, num = -1 ; [L44] short index ; [L45] int temp ; [L46] signed long long sum = 0 ; [L48] count=0 [L48] COND TRUE count=0 && index < ARR_SIZE) [L28] COND FALSE !(!cond) [L58] RET assume_abort_if_not(index>=0 && index < ARR_SIZE) [L60] EXPR array1[index] [L60] array1[index] = array1[index] + (num*num*index) [L61] EXPR array2[ARR_SIZE-1-index] [L61] array2[ARR_SIZE-1-index] = array2[ARR_SIZE-1-index] + (num * index) [L63] temp = __VERIFIER_nondet_int() [L64] COND TRUE temp == 0 [L67] count=0 [L67] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a25becec148beba97bef86c2a84619bb26dfafe7c127e8d70246837f0d2d470 [2021-11-25 19:34:27,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:34:27,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:34:27,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:34:27,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:34:27,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:34:27,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-25 19:34:27,097 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/8c15d82bc/b109edec8edf4a6583de5e272bc20a89/FLAGc74866906 [2021-11-25 19:34:27,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:34:27,575 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c [2021-11-25 19:34:27,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/8c15d82bc/b109edec8edf4a6583de5e272bc20a89/FLAGc74866906 [2021-11-25 19:34:27,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/data/8c15d82bc/b109edec8edf4a6583de5e272bc20a89 [2021-11-25 19:34:27,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:34:27,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:34:27,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:34:27,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:34:27,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:34:27,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:34:27" (1/1) ... [2021-11-25 19:34:27,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c35ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:27, skipping insertion in model container [2021-11-25 19:34:27,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:34:27" (1/1) ... [2021-11-25 19:34:27,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:34:28,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:34:28,152 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_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-25 19:34:28,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:34:28,188 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:34:28,203 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_3ebcf979-b639-4423-a98c-a53930e0c3b4/sv-benchmarks/c/array-patterns/array2_pattern.c[1322,1335] [2021-11-25 19:34:28,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:34:28,259 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:34:28,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28 WrapperNode [2021-11-25 19:34:28,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:34:28,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:34:28,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:34:28,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:34:28,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,329 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2021-11-25 19:34:28,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:34:28,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:34:28,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:34:28,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:34:28,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:34:28,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:34:28,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:34:28,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:34:28,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (1/1) ... [2021-11-25 19:34:28,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:34:28,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:28,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:34:28,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:34:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:34:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:34:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:34:28,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:34:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:34:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:34:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:34:28,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:34:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:34:28,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:34:28,596 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:34:28,597 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:34:28,927 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:34:28,934 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:34:28,935 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:34:28,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:34:28 BoogieIcfgContainer [2021-11-25 19:34:28,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:34:28,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:34:28,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:34:28,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:34:28,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:34:27" (1/3) ... [2021-11-25 19:34:28,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d36e575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:34:28, skipping insertion in model container [2021-11-25 19:34:28,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:34:28" (2/3) ... [2021-11-25 19:34:28,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d36e575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:34:28, skipping insertion in model container [2021-11-25 19:34:28,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:34:28" (3/3) ... [2021-11-25 19:34:28,948 INFO L111 eAbstractionObserver]: Analyzing ICFG array2_pattern.c [2021-11-25 19:34:28,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:34:28,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:34:29,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:34:29,036 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 [2021-11-25 19:34:29,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:34:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:34:29,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:29,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:29,077 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2021-11-25 19:34:29,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509718177] [2021-11-25 19:34:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:29,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:29,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:29,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:34:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:34:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:29,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:29,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:34:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509718177] [2021-11-25 19:34:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509718177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:29,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:29,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:34:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790359348] [2021-11-25 19:34:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:29,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:34:29,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:34:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:34:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:34:29,339 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:34:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:29,362 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-11-25 19:34:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:34:29,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 19:34:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:29,382 INFO L225 Difference]: With dead ends: 47 [2021-11-25 19:34:29,382 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:34:29,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:34:29,391 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-11-25 19:34:29,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:34:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:34:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 19:34:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-25 19:34:29,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2021-11-25 19:34:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-25 19:34:29,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:34:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-25 19:34:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:34:29,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:29,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:29,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:29,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:34:29,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2021-11-25 19:34:29,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:29,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940280623] [2021-11-25 19:34:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:29,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:29,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:29,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:34:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:34:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:29,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:29,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:34:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940280623] [2021-11-25 19:34:29,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940280623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:29,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:29,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:34:29,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304102314] [2021-11-25 19:34:29,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:29,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:34:29,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:34:29,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:34:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:34:29,858 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:29,896 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-25 19:34:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:34:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-25 19:34:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:29,899 INFO L225 Difference]: With dead ends: 26 [2021-11-25 19:34:29,899 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 19:34:29,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:34:29,901 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:29,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:34:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 19:34:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 19:34:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-25 19:34:29,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2021-11-25 19:34:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:29,911 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-25 19:34:29,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-25 19:34:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:34:29,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:29,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:29,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:30,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:34:30,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2021-11-25 19:34:30,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:30,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381144898] [2021-11-25 19:34:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:30,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:30,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:34:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:34:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:34:30,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:34:30,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:34:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381144898] [2021-11-25 19:34:30,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381144898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:34:30,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:34:30,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:34:30,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873992374] [2021-11-25 19:34:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:34:30,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:34:30,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:34:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:34:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:34:30,523 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:30,533 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-25 19:34:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:34:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-25 19:34:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:30,534 INFO L225 Difference]: With dead ends: 43 [2021-11-25 19:34:30,535 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:34:30,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:34:30,537 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:30,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-11-25 19:34:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:34:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-25 19:34:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-25 19:34:30,545 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2021-11-25 19:34:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:30,545 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-25 19:34:30,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-25 19:34:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:34:30,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:30,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:30,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:30,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:34:30,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2021-11-25 19:34:30,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903579811] [2021-11-25 19:34:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:30,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:30,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:34:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 19:34:30,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:31,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:34:31,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-25 19:34:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 77 [2021-11-25 19:34:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2021-11-25 19:34:32,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-11-25 19:34:32,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-25 19:34:33,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:33,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-11-25 19:34:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:34,441 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_62 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 64) (let ((.cse3 ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse5 (bvadd (bvmul .cse3 (_ bv4 32)) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse4 .cse5 (bvadd (bvmul .cse3 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse4 .cse5))))))) (let ((.cse0 (let ((.cse2 (bvadd (bvmul ((_ extract 31 0) (bvadd (bvneg ((_ sign_extend 32) .cse3)) c_~ARR_SIZE~0 (_ bv18446744073709551615 64))) (_ bv4 32)) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_62) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse2 (bvadd (select (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse2) (bvmul .cse3 |c_ULTIMATE.start_main_~num~0#1|)))))) (bvadd ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1| ((_ sign_extend 32) (select (select (store .cse1 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|)))))))) is different from false [2021-11-25 19:34:35,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:34:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903579811] [2021-11-25 19:34:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903579811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:34:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554340911] [2021-11-25 19:34:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:35,563 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:34:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:34:35,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:34:35,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 19:34:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 19:34:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:34:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:36,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:34:36,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:34:36,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:34:36,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:34:36,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:36,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 77 [2021-11-25 19:34:36,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2021-11-25 19:34:36,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:36,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-11-25 19:34:36,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-25 19:34:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-11-25 19:34:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:37,894 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_92 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_98 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 64) (let ((.cse2 ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|))) (let ((.cse3 (let ((.cse4 (bvadd (bvmul ((_ extract 31 0) (bvadd (bvneg ((_ sign_extend 32) .cse2)) c_~ARR_SIZE~0 (_ bv18446744073709551615 64))) (_ bv4 32)) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_92) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse4 (bvadd (bvmul .cse2 |c_ULTIMATE.start_main_~num~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_98) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse4)))))) (bvadd |c_ULTIMATE.start_main_~sum~0#1| ((_ sign_extend 32) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse1 (bvadd (bvmul .cse2 (_ bv4 32)) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse0 .cse1 (bvadd (bvmul .cse2 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse0 .cse1))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse3) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|)) ((_ sign_extend 32) (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))) is different from false [2021-11-25 19:34:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1554340911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:34:41,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780097528] [2021-11-25 19:34:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:34:41,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:41,154 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:41,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:34:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:34:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 19:34:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:34:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:34:42,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:34:42,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 19:34:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:34:43,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:43,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 48 [2021-11-25 19:34:45,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:45,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:34:45,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-11-25 19:34:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780097528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:34:52,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:34:52,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 17] total 28 [2021-11-25 19:34:52,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791862514] [2021-11-25 19:34:52,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:34:52,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:34:52,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:34:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:34:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=981, Unknown=13, NotChecked=134, Total=1332 [2021-11-25 19:34:52,463 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 19:34:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:53,304 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-25 19:34:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:34:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2021-11-25 19:34:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:53,309 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:34:53,309 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 19:34:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=235, Invalid=1092, Unknown=13, NotChecked=142, Total=1482 [2021-11-25 19:34:53,311 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 138 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2021-11-25 19:34:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 19:34:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-25 19:34:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:34:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-25 19:34:53,327 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2021-11-25 19:34:53,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:53,327 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-25 19:34:53,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-25 19:34:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-25 19:34:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:34:53,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:53,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:53,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:53,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:53,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-25 19:34:53,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:34:53,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1336652411, now seen corresponding path program 2 times [2021-11-25 19:34:53,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592969234] [2021-11-25 19:34:53,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:34:53,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:53,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:53,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:53,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:34:54,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:34:54,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:34:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:34:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:54,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:55,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:34:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592969234] [2021-11-25 19:34:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592969234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:34:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1294881871] [2021-11-25 19:34:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:34:55,317 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:34:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:34:55,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:34:55,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:34:55,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:34:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:34:55,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:34:55,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:55,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:56,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1294881871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:34:56,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793381605] [2021-11-25 19:34:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:34:56,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:34:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:34:56,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:34:56,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:34:56,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:34:56,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:34:56,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:34:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:56,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:34:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:34:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793381605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:34:57,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:34:57,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 8, 8] total 31 [2021-11-25 19:34:57,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115631705] [2021-11-25 19:34:57,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:34:57,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:34:57,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:34:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:34:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:34:57,198 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:34:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:34:58,043 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-11-25 19:34:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:34:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2021-11-25 19:34:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:34:58,046 INFO L225 Difference]: With dead ends: 54 [2021-11-25 19:34:58,047 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:34:58,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:34:58,049 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:34:58,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 169 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 104 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2021-11-25 19:34:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:34:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-11-25 19:34:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:34:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-25 19:34:58,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 28 [2021-11-25 19:34:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:34:58,056 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-25 19:34:58,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:34:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-25 19:34:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:34:58,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:34:58,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:34:58,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:58,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:34:58,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-25 19:34:58,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:34:58,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:34:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:34:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -178408891, now seen corresponding path program 3 times [2021-11-25 19:34:58,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:34:58,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842783255] [2021-11-25 19:34:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:34:58,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:34:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:34:58,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:34:58,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:34:58,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:34:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:34:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:34:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:34:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:34:59,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:00,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:35:00,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842783255] [2021-11-25 19:35:00,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842783255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:00,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1068131838] [2021-11-25 19:35:00,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:35:00,012 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:35:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:35:00,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:35:00,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:35:00,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:35:00,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:35:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:00,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1068131838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122768708] [2021-11-25 19:35:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:35:01,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:01,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:01,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:35:01,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:35:01,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:35:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:01,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:01,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122768708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:01,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:35:01,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8, 8, 7, 8] total 28 [2021-11-25 19:35:01,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533862091] [2021-11-25 19:35:01,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:35:01,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:35:01,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:35:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:35:01,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:35:01,860 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:35:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:02,321 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-25 19:35:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:35:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2021-11-25 19:35:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:02,322 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:35:02,323 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:35:02,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:35:02,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:02,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 130 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 26 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-25 19:35:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:35:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-11-25 19:35:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:35:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-25 19:35:02,333 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2021-11-25 19:35:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:02,334 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-25 19:35:02,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:35:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-25 19:35:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:35:02,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:02,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:02,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-25 19:35:02,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:02,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:35:02,938 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 400980999, now seen corresponding path program 4 times [2021-11-25 19:35:02,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:35:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812015620] [2021-11-25 19:35:02,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:35:02,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:35:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:35:02,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:35:02,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:35:03,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:35:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:03,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:35:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:03,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:35:03,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-25 19:35:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:03,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-25 19:35:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:05,827 INFO L354 Elim1Store]: treesize reduction 198, result has 23.0 percent of original size [2021-11-25 19:35:05,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 125 treesize of output 109 [2021-11-25 19:35:11,815 INFO L354 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2021-11-25 19:35:11,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 60 [2021-11-25 19:35:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:12,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:20,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:35:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812015620] [2021-11-25 19:35:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812015620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1202783857] [2021-11-25 19:35:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:35:20,083 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:35:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:35:20,084 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:35:20,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 19:35:20,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:35:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 19:35:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:20,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:35:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:20,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:35:20,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:35:20,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:35:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:35:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 19:35:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-25 19:35:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 19:35:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:21,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 91 [2021-11-25 19:35:21,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2021-11-25 19:35:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:22,034 INFO L354 Elim1Store]: treesize reduction 116, result has 22.1 percent of original size [2021-11-25 19:35:22,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 62 [2021-11-25 19:35:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:22,117 INFO L354 Elim1Store]: treesize reduction 82, result has 24.8 percent of original size [2021-11-25 19:35:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 48 [2021-11-25 19:35:28,067 INFO L354 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2021-11-25 19:35:28,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 60 [2021-11-25 19:35:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:28,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:28,584 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_348 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_349 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 64) (let ((.cse4 ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (let ((.cse5 (bvadd (bvmul ((_ extract 31 0) (bvadd (bvneg ((_ sign_extend 32) .cse4)) c_~ARR_SIZE~0 (_ bv18446744073709551615 64))) (_ bv4 32)) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_348) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse3 (bvadd (bvmul .cse4 (_ bv4 32)) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse2 .cse3 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse2 .cse3))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (bvadd ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1| ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))))) is different from false [2021-11-25 19:35:34,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1202783857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275909343] [2021-11-25 19:35:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:35:34,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:34,665 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:34,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:35:34,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:35:34,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:34,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 19:35:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:34,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:35:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:35:34,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:35:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:35:34,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:35:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-25 19:35:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:36,144 INFO L354 Elim1Store]: treesize reduction 198, result has 23.0 percent of original size [2021-11-25 19:35:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 125 treesize of output 109 [2021-11-25 19:35:41,877 INFO L354 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2021-11-25 19:35:41,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 60 [2021-11-25 19:35:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:42,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275909343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:42,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:35:42,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 22] total 24 [2021-11-25 19:35:42,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058615930] [2021-11-25 19:35:42,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:35:42,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:35:42,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:35:42,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:35:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=846, Unknown=6, NotChecked=60, Total=1056 [2021-11-25 19:35:42,787 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:35:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:42,931 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-11-25 19:35:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:35:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-25 19:35:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:42,933 INFO L225 Difference]: With dead ends: 54 [2021-11-25 19:35:42,933 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 19:35:42,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=144, Invalid=846, Unknown=6, NotChecked=60, Total=1056 [2021-11-25 19:35:42,935 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:42,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 171 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-11-25 19:35:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 19:35:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-25 19:35:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 19:35:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-25 19:35:42,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2021-11-25 19:35:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:42,946 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-25 19:35:42,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 21 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:35:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-25 19:35:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:35:42,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:42,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:42,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:43,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:43,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-25 19:35:43,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:43,560 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1151083191, now seen corresponding path program 5 times [2021-11-25 19:35:43,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:35:43,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889382349] [2021-11-25 19:35:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:35:43,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:35:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:35:43,563 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:35:43,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:35:43,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 19:35:43,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:35:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:44,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:45,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:35:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889382349] [2021-11-25 19:35:45,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889382349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577555402] [2021-11-25 19:35:45,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:35:45,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:35:45,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:35:45,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:35:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:35:45,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 19:35:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:45,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:35:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:46,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:46,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577555402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761123167] [2021-11-25 19:35:46,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-25 19:35:46,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:46,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:35:46,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-25 19:35:46,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:35:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:46,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:48,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761123167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:48,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:35:48,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 11, 12, 13] total 43 [2021-11-25 19:35:48,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180451670] [2021-11-25 19:35:48,468 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:35:48,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 19:35:48,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:35:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 19:35:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 19:35:48,472 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:35:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:50,078 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-11-25 19:35:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 19:35:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-11-25 19:35:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:50,081 INFO L225 Difference]: With dead ends: 83 [2021-11-25 19:35:50,082 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 19:35:50,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:35:50,084 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:50,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 270 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 207 Invalid, 0 Unknown, 58 Unchecked, 0.8s Time] [2021-11-25 19:35:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 19:35:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2021-11-25 19:35:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:35:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-11-25 19:35:50,097 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 32 [2021-11-25 19:35:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:50,098 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-11-25 19:35:50,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:35:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-11-25 19:35:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:35:50,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:50,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:50,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:50,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:50,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:50,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -475590135, now seen corresponding path program 6 times [2021-11-25 19:35:50,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:35:50,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636530128] [2021-11-25 19:35:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:35:50,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:35:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:35:50,714 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:35:50,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:35:50,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-25 19:35:50,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:50,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:35:50,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:52,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:52,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:35:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636530128] [2021-11-25 19:35:52,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636530128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:35:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180229743] [2021-11-25 19:35:52,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:35:52,395 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:35:52,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:35:52,396 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:35:52,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 19:35:52,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-25 19:35:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:52,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:35:52,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:53,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [180229743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647696017] [2021-11-25 19:35:53,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-25 19:35:53,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:35:53,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:35:53,792 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:35:53,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:35:54,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-25 19:35:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:35:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:35:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:35:54,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:35:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:35:55,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647696017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:35:55,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:35:55,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11, 13, 12] total 37 [2021-11-25 19:35:55,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096638101] [2021-11-25 19:35:55,554 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:35:55,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:35:55,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:35:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:35:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:35:55,556 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:35:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:35:57,303 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-11-25 19:35:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 19:35:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 32 [2021-11-25 19:35:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:35:57,305 INFO L225 Difference]: With dead ends: 93 [2021-11-25 19:35:57,306 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 19:35:57,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=738, Invalid=2232, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:35:57,307 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:35:57,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 113 Invalid, 0 Unknown, 347 Unchecked, 0.5s Time] [2021-11-25 19:35:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 19:35:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-11-25 19:35:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 19:35:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-25 19:35:57,322 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 32 [2021-11-25 19:35:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:35:57,323 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-25 19:35:57,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 19:35:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-25 19:35:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:35:57,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:35:57,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:35:57,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-25 19:35:57,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:57,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:35:57,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:35:57,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:35:57,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:35:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 7 times [2021-11-25 19:35:57,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:35:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689807284] [2021-11-25 19:35:57,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:35:57,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:35:57,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:35:57,930 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:35:57,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 19:35:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:35:58,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-25 19:35:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:35:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:35:58,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-25 19:35:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-25 19:35:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:35:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-25 19:36:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:01,297 INFO L354 Elim1Store]: treesize reduction 298, result has 24.6 percent of original size [2021-11-25 19:36:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 143 treesize of output 153 [2021-11-25 19:36:23,424 INFO L354 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2021-11-25 19:36:23,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 136 [2021-11-25 19:36:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:36:24,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:36:36,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:36:36,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689807284] [2021-11-25 19:36:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689807284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:36:36,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [541754449] [2021-11-25 19:36:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:36:36,354 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:36:36,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:36:36,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:36:36,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 19:36:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:36:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 19:36:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:36:37,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:36:37,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:36:37,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:36:37,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 19:36:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2021-11-25 19:36:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2021-11-25 19:36:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2021-11-25 19:36:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-11-25 19:36:37,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-11-25 19:36:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:37,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 70 [2021-11-25 19:36:38,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:38,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 105 [2021-11-25 19:36:38,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2021-11-25 19:36:38,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:38,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:39,033 INFO L354 Elim1Store]: treesize reduction 142, result has 37.7 percent of original size [2021-11-25 19:36:39,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 118 [2021-11-25 19:36:39,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:39,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:36:39,212 INFO L354 Elim1Store]: treesize reduction 106, result has 36.9 percent of original size [2021-11-25 19:36:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 86 [2021-11-25 19:37:09,577 INFO L354 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2021-11-25 19:37:09,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 136 [2021-11-25 19:37:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:10,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:11,133 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~index~0#1| (_ BitVec 16))) (= (_ bv0 64) (let ((.cse4 ((_ sign_extend 16) |ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (let ((.cse5 (bvadd (bvmul ((_ extract 31 0) (bvadd (bvneg ((_ sign_extend 32) .cse4)) c_~ARR_SIZE~0 (_ bv18446744073709551615 64))) (_ bv4 32)) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_673) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_675) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse3 (bvadd (bvmul .cse4 (_ bv4 32)) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse2 .cse3 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse2 .cse3))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (bvadd ((_ sign_extend 32) (select .cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) |c_ULTIMATE.start_main_~sum~0#1| ((_ sign_extend 32) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))))))) is different from false [2021-11-25 19:37:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [541754449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849590943] [2021-11-25 19:37:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:37:11,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:11,440 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:11,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:37:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:11,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-25 19:37:11,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:11,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:37:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:11,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:37:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:37:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:37:11,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:37:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:11,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-25 19:37:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:12,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-25 19:37:13,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:13,324 INFO L354 Elim1Store]: treesize reduction 298, result has 24.6 percent of original size [2021-11-25 19:37:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 143 treesize of output 153 [2021-11-25 19:37:35,380 INFO L354 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2021-11-25 19:37:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 136 [2021-11-25 19:37:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:35,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:37,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849590943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:37,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:37:37,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 25] total 27 [2021-11-25 19:37:37,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136659846] [2021-11-25 19:37:37,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:37:37,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:37:37,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:37:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:37:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1099, Unknown=2, NotChecked=68, Total=1332 [2021-11-25 19:37:37,008 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:37,136 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-25 19:37:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:37:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-11-25 19:37:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:37,144 INFO L225 Difference]: With dead ends: 98 [2021-11-25 19:37:37,144 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 19:37:37,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=163, Invalid=1099, Unknown=2, NotChecked=68, Total=1332 [2021-11-25 19:37:37,146 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:37,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 177 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 88 Unchecked, 0.0s Time] [2021-11-25 19:37:37,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 19:37:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-25 19:37:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:37:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-11-25 19:37:37,164 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 34 [2021-11-25 19:37:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-11-25 19:37:37,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:37:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-11-25 19:37:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:37:37,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:37,167 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:37,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:37,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:37,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:37,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:37,771 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash -956776499, now seen corresponding path program 8 times [2021-11-25 19:37:37,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:37:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185669341] [2021-11-25 19:37:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:37:37,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:37:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:37:37,774 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:37:37,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 19:37:37,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:37:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:37:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:37:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:39,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:37:40,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:37:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185669341] [2021-11-25 19:37:40,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185669341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:37:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1065102925] [2021-11-25 19:37:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:37:40,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:37:40,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:37:40,305 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:37:40,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 19:37:40,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:37:40,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:37:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:37:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:41,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:37:43,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1065102925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:37:43,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080680898] [2021-11-25 19:37:43,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:37:43,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:43,004 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 19:37:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:37:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:37:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:37:43,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:43,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:37:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080680898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:37:44,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:37:44,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 15, 14, 12, 12] total 53 [2021-11-25 19:37:44,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357315149] [2021-11-25 19:37:44,758 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:37:44,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 19:37:44,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:37:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 19:37:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2138, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:37:44,762 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-25 19:37:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:50,251 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-11-25 19:37:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 19:37:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2021-11-25 19:37:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:50,253 INFO L225 Difference]: With dead ends: 147 [2021-11-25 19:37:50,254 INFO L226 Difference]: Without dead ends: 143 [2021-11-25 19:37:50,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1374, Invalid=4788, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 19:37:50,257 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 253 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:50,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 443 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 250 Invalid, 0 Unknown, 406 Unchecked, 1.7s Time] [2021-11-25 19:37:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-25 19:37:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-11-25 19:37:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:37:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2021-11-25 19:37:50,281 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 36 [2021-11-25 19:37:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:50,281 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2021-11-25 19:37:50,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-25 19:37:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2021-11-25 19:37:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:37:50,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:50,284 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:50,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:50,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:50,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:50,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:37:50,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2067066744, now seen corresponding path program 1 times [2021-11-25 19:37:50,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:37:50,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261152176] [2021-11-25 19:37:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:50,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:37:50,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:37:50,895 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:37:50,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 19:37:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:51,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 19:37:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:51,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:37:51,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:51,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:37:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:37:51,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 19:37:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:51,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-25 19:37:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:53,711 INFO L354 Elim1Store]: treesize reduction 204, result has 22.4 percent of original size [2021-11-25 19:37:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 112 [2021-11-25 19:38:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:03,150 INFO L354 Elim1Store]: treesize reduction 403, result has 22.9 percent of original size [2021-11-25 19:38:03,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 193 treesize of output 203 [2021-11-25 19:39:54,078 INFO L354 Elim1Store]: treesize reduction 14, result has 84.9 percent of original size [2021-11-25 19:39:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 206 [2021-11-25 19:39:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:39:58,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:05,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:40:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261152176] [2021-11-25 19:40:05,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261152176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836164658] [2021-11-25 19:40:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:05,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:40:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:40:05,903 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:40:05,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-25 19:40:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:07,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 19:40:07,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:07,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 19:40:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:40:07,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:40:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:40:07,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:40:07,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-11-25 19:40:07,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-25 19:40:07,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 19:40:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 94 [2021-11-25 19:40:08,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2021-11-25 19:40:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:09,016 INFO L354 Elim1Store]: treesize reduction 102, result has 31.5 percent of original size [2021-11-25 19:40:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 76 [2021-11-25 19:40:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:09,117 INFO L354 Elim1Store]: treesize reduction 80, result has 30.4 percent of original size [2021-11-25 19:40:09,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 59 [2021-11-25 19:40:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:17,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 151 [2021-11-25 19:40:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 108 [2021-11-25 19:40:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:17,697 INFO L354 Elim1Store]: treesize reduction 200, result has 36.1 percent of original size [2021-11-25 19:40:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 82 treesize of output 161 [2021-11-25 19:40:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:18,025 INFO L354 Elim1Store]: treesize reduction 140, result has 33.6 percent of original size [2021-11-25 19:40:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 64 treesize of output 106 [2021-11-25 19:42:44,852 INFO L354 Elim1Store]: treesize reduction 14, result has 84.9 percent of original size [2021-11-25 19:42:44,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 206 [2021-11-25 19:42:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:47,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:47,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_968 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_964 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 64) (let ((.cse4 ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|))) (let ((.cse1 (let ((.cse5 (bvadd (bvmul ((_ extract 31 0) (bvadd (bvneg ((_ sign_extend 32) .cse4)) c_~ARR_SIZE~0 (_ bv18446744073709551615 64))) (_ bv4 32)) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_964) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_968) |c_ULTIMATE.start_main_~#array2~0#1.base|) .cse5)))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse3 (bvadd (bvmul .cse4 (_ bv4 32)) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (store .cse2 .cse3 (bvadd (bvmul .cse4 |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) (select .cse2 .cse3))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (bvadd ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1| ((_ sign_extend 32) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|)))))))) is different from false [2021-11-25 19:42:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836164658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:54,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34343654] [2021-11-25 19:42:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:54,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:54,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:54,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:54,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 19:42:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:54,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 19:42:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:54,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:42:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:42:54,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-11-25 19:42:54,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:42:54,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:42:54,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-25 19:42:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:55,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:42:55,759 INFO L354 Elim1Store]: treesize reduction 204, result has 22.4 percent of original size [2021-11-25 19:42:55,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 112 [2021-11-25 19:43:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:43:03,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:43:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:43:04,023 INFO L354 Elim1Store]: treesize reduction 436, result has 16.6 percent of original size [2021-11-25 19:43:04,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 193 treesize of output 170 [2021-11-25 19:44:30,136 INFO L354 Elim1Store]: treesize reduction 14, result has 84.9 percent of original size [2021-11-25 19:44:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 194 treesize of output 206 [2021-11-25 19:44:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:31,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:44:32,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34343654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:32,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:44:32,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 27] total 29 [2021-11-25 19:44:32,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319953759] [2021-11-25 19:44:32,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:44:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:44:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:44:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:44:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1134, Unknown=7, NotChecked=70, Total=1406 [2021-11-25 19:44:32,269 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:44:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:44:32,806 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-11-25 19:44:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 19:44:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-11-25 19:44:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:44:32,809 INFO L225 Difference]: With dead ends: 134 [2021-11-25 19:44:32,809 INFO L226 Difference]: Without dead ends: 124 [2021-11-25 19:44:32,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=195, Invalid=1134, Unknown=7, NotChecked=70, Total=1406 [2021-11-25 19:44:32,811 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:44:32,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 165 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-11-25 19:44:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-25 19:44:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-25 19:44:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 105 states have internal predecessors, (119), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:44:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2021-11-25 19:44:32,839 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 38 [2021-11-25 19:44:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:44:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2021-11-25 19:44:32,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 25 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 19:44:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2021-11-25 19:44:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:44:32,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:44:32,841 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:44:32,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 19:44:33,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-25 19:44:33,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-25 19:44:33,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:44:33,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:44:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:44:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -285980785, now seen corresponding path program 9 times [2021-11-25 19:44:33,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:44:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602694528] [2021-11-25 19:44:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:44:33,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:44:33,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:44:33,470 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:44:33,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ebcf979-b639-4423-a98c-a53930e0c3b4/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 19:44:33,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:44:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:44:33,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 19:44:33,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:34,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 19:44:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-11-25 19:44:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 19:44:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 19:44:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-25 19:44:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-25 19:44:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:35,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2021-11-25 19:44:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:37,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:44:38,224 INFO L354 Elim1Store]: treesize reduction 290, result has 45.6 percent of original size [2021-11-25 19:44:38,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 161 treesize of output 305