./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur --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 217f19c8e5e57d916627a12a8c23c5343b3d451054ddc6d3d6dc70e40dff121a --- Real Ultimate output --- [0.003s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:17:06,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:17:06,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:17:06,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:17:06,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:17:06,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:17:06,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:17:06,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:17:06,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:17:06,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:17:06,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:17:06,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:17:06,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:17:06,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:17:06,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:17:06,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:17:06,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:17:06,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:17:06,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:17:06,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:17:06,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:17:06,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:17:06,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:17:06,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:17:06,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:17:06,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:17:06,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:17:06,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:17:06,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:17:06,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:17:06,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:17:06,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:17:06,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:17:06,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:17:06,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:17:06,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:17:06,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:17:06,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:17:06,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:17:06,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:17:06,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:17:06,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:17:06,803 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:17:06,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:17:06,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:17:06,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:17:06,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:17:06,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:17:06,806 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:17:06,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:17:06,807 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:17:06,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:17:06,807 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:17:06,807 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:17:06,807 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:17:06,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:17:06,808 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:17:06,808 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:17:06,809 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:17:06,809 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:17:06,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:17:06,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:17:06,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:17:06,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:17:06,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:17:06,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:17:06,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:17:06,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:17:06,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:17:06,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:17:06,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:17:06,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:17:06,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:17:06,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:17:06,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:17:06,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:17:06,813 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:17:06,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:17:06,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:17:06,814 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:17:06,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:17:06,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:17:06,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:17:06,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 217f19c8e5e57d916627a12a8c23c5343b3d451054ddc6d3d6dc70e40dff121a [2022-11-25 23:17:07,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:17:07,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:17:07,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:17:07,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:17:07,077 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:17:07,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2022-11-25 23:17:10,172 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:17:10,372 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:17:10,373 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i [2022-11-25 23:17:10,380 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/data/48375bb09/eef5b874099c40fd8e681fbdc02a9793/FLAG08dc35c84 [2022-11-25 23:17:10,395 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/data/48375bb09/eef5b874099c40fd8e681fbdc02a9793 [2022-11-25 23:17:10,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:17:10,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:17:10,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:17:10,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:17:10,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:17:10,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5fea03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10, skipping insertion in model container [2022-11-25 23:17:10,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:17:10,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:17:10,599 WARN L237 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_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2022-11-25 23:17:10,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:17:10,626 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:17:10,639 WARN L237 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_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/sv-benchmarks/c/array-examples/standard_copy3_ground-2.i[816,829] [2022-11-25 23:17:10,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:17:10,663 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:17:10,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10 WrapperNode [2022-11-25 23:17:10,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:17:10,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:17:10,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:17:10,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:17:10,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,701 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2022-11-25 23:17:10,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:17:10,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:17:10,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:17:10,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:17:10,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,728 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:17:10,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:17:10,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:17:10,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:17:10,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (1/1) ... [2022-11-25 23:17:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:17:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:10,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:17:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:17:10,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:17:10,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:17:10,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:17:10,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:17:10,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:17:10,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:17:10,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:17:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:17:10,891 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:17:10,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:17:11,083 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:17:11,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:17:11,170 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 23:17:11,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:17:11 BoogieIcfgContainer [2022-11-25 23:17:11,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:17:11,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:17:11,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:17:11,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:17:11,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:17:10" (1/3) ... [2022-11-25 23:17:11,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37004990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:17:11, skipping insertion in model container [2022-11-25 23:17:11,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:17:10" (2/3) ... [2022-11-25 23:17:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37004990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:17:11, skipping insertion in model container [2022-11-25 23:17:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:17:11" (3/3) ... [2022-11-25 23:17:11,198 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2022-11-25 23:17:11,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:17:11,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:17:11,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:17:11,282 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@79a8c65, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:17:11,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:17:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:17:11,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:11,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:11,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash 138745506, now seen corresponding path program 1 times [2022-11-25 23:17:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382732239] [2022-11-25 23:17:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:17:11,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382732239] [2022-11-25 23:17:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382732239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:11,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:17:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:17:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33816097] [2022-11-25 23:17:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:11,612 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:11,663 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-25 23:17:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:17:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:11,684 INFO L225 Difference]: With dead ends: 21 [2022-11-25 23:17:11,684 INFO L226 Difference]: Without dead ends: 11 [2022-11-25 23:17:11,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:17:11,690 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:11,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:17:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-25 23:17:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-25 23:17:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-25 23:17:11,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2022-11-25 23:17:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:11,733 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-25 23:17:11,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-25 23:17:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:17:11,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:11,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:17:11,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1942781126, now seen corresponding path program 1 times [2022-11-25 23:17:11,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:11,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714890959] [2022-11-25 23:17:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:11,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:17:11,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714890959] [2022-11-25 23:17:11,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714890959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687528069] [2022-11-25 23:17:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:11,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:11,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:12,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:17:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:17:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:17:12,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:17:12,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687528069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:17:12,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:17:12,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 23:17:12,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824807436] [2022-11-25 23:17:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:17:12,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:17:12,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:17:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:17:12,195 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:12,243 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-11-25 23:17:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:17:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:17:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:12,244 INFO L225 Difference]: With dead ends: 21 [2022-11-25 23:17:12,245 INFO L226 Difference]: Without dead ends: 14 [2022-11-25 23:17:12,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:17:12,246 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:12,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:17:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-25 23:17:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-25 23:17:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-25 23:17:12,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-11-25 23:17:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:12,256 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-25 23:17:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-25 23:17:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:17:12,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:12,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:12,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:17:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:12,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1294728835, now seen corresponding path program 1 times [2022-11-25 23:17:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512685162] [2022-11-25 23:17:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:12,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:17:12,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512685162] [2022-11-25 23:17:12,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512685162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504367145] [2022-11-25 23:17:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:12,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:12,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:17:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:17:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:17:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:17:12,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504367145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726547271] [2022-11-25 23:17:12,891 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:12,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:12,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:12,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:12,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:13,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,171 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:17:13,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:17:13,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,356 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:13,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:13,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:17:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:13,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:13,850 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:17:13,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:17:14,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,561 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:14,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:14,596 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:14,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:14,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,717 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:14,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:14,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:14,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:14,865 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:14,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:14,954 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:14,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:15,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:15,032 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:15,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:15,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:15,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:15,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:15,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:15,124 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:15,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:15,169 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:15,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:15,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:15,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:15,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:15,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:15,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:17:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333451936] [2022-11-25 23:17:15,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:17:15,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:17:15,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:17:15,415 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:15,458 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-25 23:17:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:17:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:17:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:15,463 INFO L225 Difference]: With dead ends: 28 [2022-11-25 23:17:15,468 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 23:17:15,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:17:15,469 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:15,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:17:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 23:17:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-25 23:17:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 23:17:15,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-25 23:17:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:15,474 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 23:17:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-25 23:17:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:17:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:15,475 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:15,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:15,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:15,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash 387492891, now seen corresponding path program 2 times [2022-11-25 23:17:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:15,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562934382] [2022-11-25 23:17:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:17:15,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562934382] [2022-11-25 23:17:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562934382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934052647] [2022-11-25 23:17:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:15,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:15,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:15,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:17:15,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:17:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:17:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:17:15,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:17:15,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934052647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:15,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801461981] [2022-11-25 23:17:15,963 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:15,963 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:15,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:15,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:15,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:15,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,089 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:17:16,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:17:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,247 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:16,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:17:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:16,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,543 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:17:16,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 440 treesize of output 408 [2022-11-25 23:17:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,681 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:16,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:16,718 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:16,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:16,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,799 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:16,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:16,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,880 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:16,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:16,907 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:16,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:16,994 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:16,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:17,078 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:17,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:17,105 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:17,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:17,199 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:17,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:17,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:17,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:17,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:17,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:17,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:17,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:17,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:17,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 23:17:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809991747] [2022-11-25 23:17:17,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:17:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:17:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:17:17,483 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:17,552 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2022-11-25 23:17:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:17:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:17:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:17,553 INFO L225 Difference]: With dead ends: 35 [2022-11-25 23:17:17,554 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 23:17:17,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:17:17,555 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:17,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:17:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 23:17:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-25 23:17:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-25 23:17:17,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-11-25 23:17:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:17,564 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-25 23:17:17,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-25 23:17:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:17:17,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:17,572 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:17,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:17,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:17,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1477020446, now seen corresponding path program 3 times [2022-11-25 23:17:17,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579065173] [2022-11-25 23:17:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:17,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579065173] [2022-11-25 23:17:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579065173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131245762] [2022-11-25 23:17:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:17:17,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:17,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:17,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:17:18,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:17:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:18,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:17:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:18,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:18,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131245762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:18,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877923633] [2022-11-25 23:17:18,125 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:18,125 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:18,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:18,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:18,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,270 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:18,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-25 23:17:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:17:18,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:18,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:18,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:18,581 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:17:18,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:17:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,103 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:19,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:19,134 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:19,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:19,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,231 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:19,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:19,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,321 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:19,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:19,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,358 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:19,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,407 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:19,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,459 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:19,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:19,495 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:19,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:19,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,576 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:19,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:19,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:19,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:19,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:19,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:19,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:19,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:19,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:19,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:17:19,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000309780] [2022-11-25 23:17:19,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:19,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:17:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:17:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:17:19,988 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:20,035 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-11-25 23:17:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:17:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 23:17:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:20,037 INFO L225 Difference]: With dead ends: 52 [2022-11-25 23:17:20,037 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 23:17:20,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:17:20,038 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:20,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:17:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 23:17:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-25 23:17:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-25 23:17:20,043 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-11-25 23:17:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:20,044 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-25 23:17:20,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-25 23:17:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:17:20,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:20,045 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:20,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:20,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 993193442, now seen corresponding path program 4 times [2022-11-25 23:17:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:20,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971483628] [2022-11-25 23:17:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:20,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971483628] [2022-11-25 23:17:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971483628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709882111] [2022-11-25 23:17:20,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:17:20,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:20,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:20,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:17:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:20,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:17:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:20,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:20,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709882111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661352881] [2022-11-25 23:17:20,968 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:20,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:20,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:20,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:20,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,122 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:21,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:21,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-25 23:17:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:17:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,402 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:17:21,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:17:21,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,890 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:21,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,920 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:21,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:21,968 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:21,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,040 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:22,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:22,063 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:22,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,158 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:22,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,220 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:22,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:22,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:22,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:22,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,285 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:22,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:22,341 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:22,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:22,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:22,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:22,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:22,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:22,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 23:17:22,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492679621] [2022-11-25 23:17:22,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:22,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:17:22,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:17:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:17:22,600 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:22,658 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-25 23:17:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:17:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:17:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:22,660 INFO L225 Difference]: With dead ends: 64 [2022-11-25 23:17:22,660 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 23:17:22,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:17:22,661 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:22,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:17:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 23:17:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-25 23:17:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-11-25 23:17:22,667 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2022-11-25 23:17:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:22,668 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-11-25 23:17:22,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-11-25 23:17:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:17:22,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:22,669 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:22,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:22,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:22,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash -893411358, now seen corresponding path program 5 times [2022-11-25 23:17:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585210359] [2022-11-25 23:17:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 23:17:23,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585210359] [2022-11-25 23:17:23,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585210359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469553331] [2022-11-25 23:17:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:23,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:23,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:17:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:17:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:17:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-25 23:17:24,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-25 23:17:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469553331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807838644] [2022-11-25 23:17:24,351 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:24,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:24,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:24,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:24,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,482 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:17:24,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:17:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,637 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:24,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:17:24,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:24,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:24,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:24,906 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:17:24,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:17:25,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,353 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:25,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,382 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:25,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:25,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,432 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:25,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:25,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,472 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:25,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:25,497 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:25,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,567 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:25,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:25,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,634 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:25,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:25,659 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:25,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:25,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,731 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:25,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:25,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:25,786 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:25,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:25,799 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:26,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:26,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:26,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-25 23:17:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678873837] [2022-11-25 23:17:26,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:17:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:17:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:17:26,112 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:26,276 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-11-25 23:17:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:17:26,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-25 23:17:26,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:26,277 INFO L225 Difference]: With dead ends: 83 [2022-11-25 23:17:26,277 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 23:17:26,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:17:26,279 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:26,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:17:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 23:17:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-25 23:17:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-25 23:17:26,287 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2022-11-25 23:17:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:26,287 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-25 23:17:26,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-25 23:17:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 23:17:26,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:26,289 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:26,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:26,496 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 898914522, now seen corresponding path program 6 times [2022-11-25 23:17:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685025894] [2022-11-25 23:17:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:27,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:27,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685025894] [2022-11-25 23:17:27,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685025894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:27,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43910939] [2022-11-25 23:17:27,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:17:27,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:27,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:27,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:17:27,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:17:27,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:17:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:27,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:28,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43910939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170080212] [2022-11-25 23:17:28,518 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:28,519 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:28,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:28,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:28,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,667 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:28,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-25 23:17:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:17:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:28,899 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:17:28,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 440 treesize of output 408 [2022-11-25 23:17:28,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:28,987 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:28,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:29,014 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:29,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:29,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,111 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:29,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:29,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,163 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:29,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,193 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:29,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:29,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,230 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:29,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:29,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,273 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:29,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:29,317 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:29,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,395 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:29,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:29,456 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:29,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:29,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:30,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:30,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:30,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:30,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-25 23:17:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762594344] [2022-11-25 23:17:30,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:30,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 23:17:30,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 23:17:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:17:30,176 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:30,307 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-11-25 23:17:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 23:17:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-25 23:17:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:30,312 INFO L225 Difference]: With dead ends: 126 [2022-11-25 23:17:30,312 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 23:17:30,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:17:30,316 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:30,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:17:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 23:17:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-25 23:17:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-11-25 23:17:30,346 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 61 [2022-11-25 23:17:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:30,348 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-11-25 23:17:30,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-11-25 23:17:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 23:17:30,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:30,351 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:30,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:17:30,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -114098366, now seen corresponding path program 7 times [2022-11-25 23:17:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285874127] [2022-11-25 23:17:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:33,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285874127] [2022-11-25 23:17:33,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285874127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:33,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735850838] [2022-11-25 23:17:33,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:17:33,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:33,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:17:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 23:17:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:33,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:37,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735850838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:37,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575831988] [2022-11-25 23:17:37,227 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:37,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:37,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:37,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:37,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,326 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:17:37,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:17:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,462 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:37,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:17:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:37,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:37,726 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:17:37,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:17:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,154 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:38,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:38,186 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:38,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:38,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,290 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:17:38,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:17:38,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,364 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:38,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:38,388 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:38,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:38,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,494 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:38,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,564 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:38,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:38,592 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:38,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,690 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:38,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:38,773 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:38,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:38,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:39,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:39,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:39,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:39,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-25 23:17:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365958666] [2022-11-25 23:17:39,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 23:17:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 23:17:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 23:17:39,183 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:39,385 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-11-25 23:17:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 23:17:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-25 23:17:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:39,387 INFO L225 Difference]: With dead ends: 176 [2022-11-25 23:17:39,387 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 23:17:39,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 23:17:39,390 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:39,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:17:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 23:17:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-11-25 23:17:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-11-25 23:17:39,400 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 86 [2022-11-25 23:17:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:39,401 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-11-25 23:17:39,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-11-25 23:17:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 23:17:39,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:39,403 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:39,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:39,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:39,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1787684286, now seen corresponding path program 8 times [2022-11-25 23:17:39,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:39,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771693471] [2022-11-25 23:17:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:39,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-25 23:17:48,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771693471] [2022-11-25 23:17:48,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771693471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271313293] [2022-11-25 23:17:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:48,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:48,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:17:52,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:17:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:52,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:17:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-25 23:17:52,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-11-25 23:17:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271313293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:53,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631760591] [2022-11-25 23:17:53,636 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:17:53,636 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:53,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:53,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:53,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,734 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:17:53,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:17:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,860 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:17:53,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:17:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:53,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:17:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,066 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:17:54,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 440 treesize of output 408 [2022-11-25 23:17:54,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,191 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:17:54,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:17:54,220 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:54,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:54,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,297 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:54,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:54,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,352 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:54,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:54,373 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:17:54,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:17:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,464 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:17:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:17:54,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,546 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:54,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:54,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:54,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:54,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,610 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:17:54,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:17:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:54,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:17:54,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:17:54,658 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:55,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4781#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:55,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:55,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:17:55,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-25 23:17:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233853173] [2022-11-25 23:17:55,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-25 23:17:55,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-25 23:17:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 23:17:55,285 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:55,685 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2022-11-25 23:17:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-25 23:17:55,686 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-25 23:17:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:55,689 INFO L225 Difference]: With dead ends: 213 [2022-11-25 23:17:55,689 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 23:17:55,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 23:17:55,695 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:55,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:17:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 23:17:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-25 23:17:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-11-25 23:17:55,708 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 136 [2022-11-25 23:17:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:55,709 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-11-25 23:17:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:17:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-11-25 23:17:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-25 23:17:55,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:55,712 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:55,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:17:55,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash -856886374, now seen corresponding path program 9 times [2022-11-25 23:17:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:55,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340741199] [2022-11-25 23:17:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:18:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:18:04,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:18:04,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340741199] [2022-11-25 23:18:04,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340741199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:18:04,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964189894] [2022-11-25 23:18:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:18:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:04,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:18:04,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:18:04,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:18:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:18:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 2246 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 23:18:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:18:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:18:17,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964189894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:17,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764422343] [2022-11-25 23:18:17,128 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:18:17,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:18:17,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:18:17,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:18:17,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:18:17,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,228 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:18:17,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:18:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,355 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:18:17,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:18:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:18:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:18:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,516 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:18:17,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 440 treesize of output 408 [2022-11-25 23:18:17,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,610 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:18:17,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:18:17,636 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:18:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:18:17,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,705 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:18:17,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:18:17,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,759 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:18:17,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:18:17,781 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:18:17,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:18:17,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,871 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:18:17,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:18:17,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:17,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:18:17,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:18:17,968 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:18:17,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:18:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:18,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:18,048 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:18:18,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:18:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:18:18,121 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:18:18,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:18:18,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:18:18,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6783#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:18:18,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:18:18,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:18:18,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-25 23:18:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760379047] [2022-11-25 23:18:18,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:18:18,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-25 23:18:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:18:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-25 23:18:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 23:18:18,723 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:18:19,341 INFO L93 Difference]: Finished difference Result 350 states and 458 transitions. [2022-11-25 23:18:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-25 23:18:19,342 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-11-25 23:18:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:18:19,343 INFO L225 Difference]: With dead ends: 350 [2022-11-25 23:18:19,344 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 23:18:19,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 23:18:19,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:18:19,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:18:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 23:18:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-25 23:18:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-11-25 23:18:19,363 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 173 [2022-11-25 23:18:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:18:19,363 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-11-25 23:18:19,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-11-25 23:18:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-25 23:18:19,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:18:19,369 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:18:19,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:19,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:19,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:18:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:18:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash 738196482, now seen corresponding path program 10 times [2022-11-25 23:18:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:18:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985434227] [2022-11-25 23:18:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:18:19,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:18:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:18:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:18:48,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:18:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985434227] [2022-11-25 23:18:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985434227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:18:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854464555] [2022-11-25 23:18:48,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:18:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:48,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:18:48,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:18:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:18:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 3963 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-25 23:18:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:18:50,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:19:39,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854464555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:39,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67829252] [2022-11-25 23:19:39,027 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:19:39,027 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:39,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:39,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:39,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,138 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-11-25 23:19:39,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-11-25 23:19:39,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,279 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:19:39,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:19:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,472 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:39,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 420 treesize of output 410 [2022-11-25 23:19:39,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,826 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:39,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:39,851 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:39,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:39,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,933 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:39,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:19:40,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,011 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:40,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:40,033 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:40,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,114 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:40,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-25 23:19:40,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,190 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:40,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:40,213 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:40,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:40,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,278 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:40,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:19:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:40,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:40,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:40,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:41,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10069#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:41,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:41,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:41,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-25 23:19:41,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574738019] [2022-11-25 23:19:41,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:41,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-25 23:19:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-25 23:19:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 23:19:41,359 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:44,069 INFO L93 Difference]: Finished difference Result 552 states and 761 transitions. [2022-11-25 23:19:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-25 23:19:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2022-11-25 23:19:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:44,072 INFO L225 Difference]: With dead ends: 552 [2022-11-25 23:19:44,072 INFO L226 Difference]: Without dead ends: 478 [2022-11-25 23:19:44,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 23:19:44,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:44,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:19:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-25 23:19:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-11-25 23:19:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0104821802935011) internal successors, (482), 477 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 482 transitions. [2022-11-25 23:19:44,103 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 482 transitions. Word has length 274 [2022-11-25 23:19:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:44,103 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 482 transitions. [2022-11-25 23:19:44,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 482 transitions. [2022-11-25 23:19:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-25 23:19:44,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:44,114 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:44,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:19:44,332 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1892465410, now seen corresponding path program 11 times [2022-11-25 23:19:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137555552] [2022-11-25 23:19:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-11-25 23:21:49,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:49,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137555552] [2022-11-25 23:21:49,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137555552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:49,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708988313] [2022-11-25 23:21:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:21:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:49,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:49,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:25:24,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-25 23:25:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:25:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-25 23:25:28,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-11-25 23:25:33,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708988313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:33,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711835558] [2022-11-25 23:25:33,297 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:25:33,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:25:33,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:25:33,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:25:33,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:25:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,440 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-11-25 23:25:33,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-11-25 23:25:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-11-25 23:25:33,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:25:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,628 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:25:33,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 440 treesize of output 408 [2022-11-25 23:25:33,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,716 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:25:33,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:25:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:25:33,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:25:33,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,780 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:25:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:25:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,811 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:25:33,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:25:33,838 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:25:33,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:25:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:33,959 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:25:33,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-25 23:25:34,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:34,016 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:25:34,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:25:34,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:34,041 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:25:34,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:25:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:25:34,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:34,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:34,077 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:25:34,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 97 [2022-11-25 23:25:34,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:25:34,114 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:25:34,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:25:34,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:25:36,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15421#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-25 23:25:36,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:25:36,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:25:36,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-25 23:25:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239897539] [2022-11-25 23:25:36,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-25 23:25:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:25:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-25 23:25:36,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-25 23:25:36,160 INFO L87 Difference]: Start difference. First operand 478 states and 482 transitions. Second operand has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:40,620 INFO L93 Difference]: Finished difference Result 625 states and 705 transitions. [2022-11-25 23:25:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-25 23:25:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2022-11-25 23:25:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:40,627 INFO L225 Difference]: With dead ends: 625 [2022-11-25 23:25:40,628 INFO L226 Difference]: Without dead ends: 551 [2022-11-25 23:25:40,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1830 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20837 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=82957, Invalid=124523, Unknown=0, NotChecked=0, Total=207480 [2022-11-25 23:25:40,639 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:40,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:25:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-25 23:25:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-11-25 23:25:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 555 transitions. [2022-11-25 23:25:40,666 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 555 transitions. Word has length 476 [2022-11-25 23:25:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:40,667 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 555 transitions. [2022-11-25 23:25:40,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0310421286031042) internal successors, (465), 451 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 555 transitions. [2022-11-25 23:25:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-25 23:25:40,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:40,683 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:40,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:25:40,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1367188762, now seen corresponding path program 12 times [2022-11-25 23:25:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:25:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104874338] [2022-11-25 23:25:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:25:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:25:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-25 23:27:50,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:50,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104874338] [2022-11-25 23:27:50,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104874338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:27:50,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695838685] [2022-11-25 23:27:50,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:27:50,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:50,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5c16342-ff39-4fda-89e2-fea0ac8b86ff/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:27:53,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:27:53,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:27:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 7918 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-25 23:27:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-11-25 23:27:54,164 INFO L328 TraceCheckSpWp]: Computing backward predicates...