./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh --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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:00:29,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:00:29,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:00:29,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:00:29,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:00:29,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:00:29,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:00:29,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:00:29,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:00:29,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:00:29,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:00:29,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:00:29,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:00:29,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:00:29,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:00:29,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:00:29,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:00:29,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:00:29,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:00:29,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:00:29,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:00:29,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:00:29,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:00:29,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:00:29,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:00:29,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:00:29,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:00:29,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:00:29,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:00:29,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:00:29,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:00:29,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:00:29,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:00:29,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:00:29,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:00:29,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:00:29,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:00:29,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:00:29,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:00:29,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:00:29,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:00:29,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:00:29,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:00:29,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:00:29,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:00:29,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:00:29,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:00:29,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:00:29,802 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:00:29,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:00:29,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:00:29,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:00:29,802 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:00:29,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:00:29,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:00:29,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:00:29,803 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:00:29,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:00:29,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:00:29,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:00:29,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:00:29,805 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:00:29,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:00:29,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:00:29,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:00:29,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:00:29,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:00:29,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:00:29,806 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:00:29,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:00:29,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:00:29,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:00:29,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:00:29,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:00:29,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:00:29,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:00:29,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:00:29,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:00:29,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:00:29,808 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:00:29,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:00:29,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:00:29,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:00:29,809 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_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2022-12-14 13:00:30,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:00:30,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:00:30,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:00:30,029 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:00:30,030 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:00:30,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-12-14 13:00:32,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:00:32,799 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:00:32,799 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-12-14 13:00:32,804 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/data/6a8462587/79041a791a644fd49100ac4c6e686dbd/FLAG50b0e0577 [2022-12-14 13:00:32,815 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/data/6a8462587/79041a791a644fd49100ac4c6e686dbd [2022-12-14 13:00:32,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:00:32,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:00:32,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:00:32,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:00:32,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:00:32,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:32,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78558713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32, skipping insertion in model container [2022-12-14 13:00:32,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:32,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:00:32,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:00:32,944 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_e4845a57-ef03-4072-9090-8bd676e3ca0a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-12-14 13:00:32,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:00:32,967 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:00:32,975 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_e4845a57-ef03-4072-9090-8bd676e3ca0a/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-12-14 13:00:32,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:00:32,993 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:00:32,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32 WrapperNode [2022-12-14 13:00:32,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:00:32,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:00:32,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:00:32,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:00:32,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,020 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2022-12-14 13:00:33,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:00:33,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:00:33,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:00:33,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:00:33,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:00:33,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:00:33,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:00:33,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:00:33,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (1/1) ... [2022-12-14 13:00:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:00:33,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:33,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:00:33,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:00:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:00:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:00:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:00:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:00:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:00:33,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:00:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:00:33,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:00:33,170 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:00:33,172 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:00:33,335 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:00:33,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:00:33,404 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 13:00:33,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:00:33 BoogieIcfgContainer [2022-12-14 13:00:33,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:00:33,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:00:33,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:00:33,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:00:33,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:00:32" (1/3) ... [2022-12-14 13:00:33,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e616d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:00:33, skipping insertion in model container [2022-12-14 13:00:33,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:00:32" (2/3) ... [2022-12-14 13:00:33,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e616d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:00:33, skipping insertion in model container [2022-12-14 13:00:33,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:00:33" (3/3) ... [2022-12-14 13:00:33,413 INFO L112 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2022-12-14 13:00:33,427 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:00:33,427 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:00:33,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:00:33,466 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;@3786d5de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:00:33,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:00:33,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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) [2022-12-14 13:00:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:00:33,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:33,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:33,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 427680054, now seen corresponding path program 1 times [2022-12-14 13:00:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397318199] [2022-12-14 13:00:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:00:33,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:33,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397318199] [2022-12-14 13:00:33,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397318199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:33,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:00:33,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:00:33,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913599448] [2022-12-14 13:00:33,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:00:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:00:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:00:33,688 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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 3.0) internal successors, (9), 2 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) [2022-12-14 13:00:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:33,739 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2022-12-14 13:00:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:00:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2022-12-14 13:00:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:33,746 INFO L225 Difference]: With dead ends: 33 [2022-12-14 13:00:33,747 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 13:00:33,749 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 [2022-12-14 13:00:33,751 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:33,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 13:00:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 13:00:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2022-12-14 13:00:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2022-12-14 13:00:33,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2022-12-14 13:00:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:33,774 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2022-12-14 13:00:33,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-12-14 13:00:33,774 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2022-12-14 13:00:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:00:33,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:33,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:33,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:00:33,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1288425971, now seen corresponding path program 1 times [2022-12-14 13:00:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355920689] [2022-12-14 13:00:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:00:33,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355920689] [2022-12-14 13:00:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355920689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:33,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:00:33,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:00:33,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419831638] [2022-12-14 13:00:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:33,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:00:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:00:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:00:33,863 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 13:00:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:33,903 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-12-14 13:00:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:00:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-12-14 13:00:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:33,904 INFO L225 Difference]: With dead ends: 29 [2022-12-14 13:00:33,904 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 13:00:33,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:00:33,905 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:33,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 13:00:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-12-14 13:00:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-12-14 13:00:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-12-14 13:00:33,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2022-12-14 13:00:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:33,909 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-12-14 13:00:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 13:00:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-12-14 13:00:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:00:33,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:33,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:00:33,910 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1643959839, now seen corresponding path program 1 times [2022-12-14 13:00:33,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:33,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314862311] [2022-12-14 13:00:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:33,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314862311] [2022-12-14 13:00:33,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314862311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:33,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:00:33,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:00:33,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587458365] [2022-12-14 13:00:33,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:33,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:00:33,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:33,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:00:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:00:33,959 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 13:00:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:33,986 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 13:00:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:00:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2022-12-14 13:00:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:33,987 INFO L225 Difference]: With dead ends: 27 [2022-12-14 13:00:33,988 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 13:00:33,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:00:33,989 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:33,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:00:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 13:00:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 13:00:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-12-14 13:00:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 13:00:33,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2022-12-14 13:00:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:33,992 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 13:00:33,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-12-14 13:00:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 13:00:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 13:00:33,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:33,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:33,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:00:33,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1366269224, now seen corresponding path program 1 times [2022-12-14 13:00:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:33,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322026699] [2022-12-14 13:00:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:33,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:34,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322026699] [2022-12-14 13:00:34,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322026699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:34,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826594562] [2022-12-14 13:00:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:34,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:34,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:34,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:00:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:00:34,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:00:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826594562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237756941] [2022-12-14 13:00:34,270 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 13:00:34,270 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:34,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:34,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:34,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:34,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,397 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:00:34,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:00:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,476 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:34,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:34,660 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:00:34,661 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 374 treesize of output 342 [2022-12-14 13:00:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:34,746 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:34,746 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 [2022-12-14 13:00:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:34,816 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:00:34,817 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 30 treesize of output 25 [2022-12-14 13:00:35,000 INFO L321 Elim1Store]: treesize reduction 137, result has 31.8 percent of original size [2022-12-14 13:00:35,000 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 225 treesize of output 245 [2022-12-14 13:00:35,890 INFO L321 Elim1Store]: treesize reduction 142, result has 29.4 percent of original size [2022-12-14 13:00:35,890 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 225 treesize of output 240 [2022-12-14 13:00:36,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:37,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [237756941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:00:37,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:37,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2022-12-14 13:00:37,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861743010] [2022-12-14 13:00:37,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:00:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:00:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:00:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:00:37,056 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-12-14 13:00:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:37,329 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-12-14 13:00:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:00:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) Word has length 15 [2022-12-14 13:00:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:37,330 INFO L225 Difference]: With dead ends: 38 [2022-12-14 13:00:37,330 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 13:00:37,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:00:37,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:37,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 13:00:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-12-14 13:00:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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) [2022-12-14 13:00:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-12-14 13:00:37,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2022-12-14 13:00:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-12-14 13:00:37,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-12-14 13:00:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-12-14 13:00:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:00:37,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:37,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:37,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:37,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:37,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1964351942, now seen corresponding path program 1 times [2022-12-14 13:00:37,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309847386] [2022-12-14 13:00:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:37,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:37,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309847386] [2022-12-14 13:00:37,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309847386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039958714] [2022-12-14 13:00:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:37,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:00:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:00:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:37,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:00:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039958714] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610787274] [2022-12-14 13:00:37,843 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:00:37,843 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:37,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:37,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:37,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,895 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:00:37,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:00:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,958 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:37,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:37,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:38,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:38,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:38,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:38,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:38,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:38,114 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:00:38,115 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 374 treesize of output 342 [2022-12-14 13:00:38,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:38,182 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:38,183 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 [2022-12-14 13:00:38,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:38,224 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:00:38,225 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 30 treesize of output 25 [2022-12-14 13:00:38,385 INFO L321 Elim1Store]: treesize reduction 142, result has 29.4 percent of original size [2022-12-14 13:00:38,385 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 225 treesize of output 240 [2022-12-14 13:00:39,715 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:00:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:39,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:39,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:39,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:40,079 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:00:40,079 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 28 treesize of output 27 [2022-12-14 13:00:40,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:40,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= |ULTIMATE.start_main_~n~0#1| 2) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:40,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:40,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-12-14 13:00:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593229082] [2022-12-14 13:00:40,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:40,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:00:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:00:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:00:41,000 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-12-14 13:00:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:41,147 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-12-14 13:00:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:00:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 19 [2022-12-14 13:00:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:41,148 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:00:41,149 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:00:41,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:00:41,150 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:41,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 37 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:00:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2022-12-14 13:00:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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) [2022-12-14 13:00:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-12-14 13:00:41,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2022-12-14 13:00:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:41,160 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-12-14 13:00:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-12-14 13:00:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-12-14 13:00:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:00:41,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:41,161 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:41,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:00:41,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:41,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 658129974, now seen corresponding path program 2 times [2022-12-14 13:00:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949882465] [2022-12-14 13:00:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:00:41,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:41,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949882465] [2022-12-14 13:00:41,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949882465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:41,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439375415] [2022-12-14 13:00:41,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:41,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:41,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:41,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:00:41,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:00:41,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:00:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:00:41,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:41,727 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 13:00:41,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-12-14 13:00:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:00:41,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439375415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810582614] [2022-12-14 13:00:41,744 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:00:41,744 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:41,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:41,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:41,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:41,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,801 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:00:41,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:00:41,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,874 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:41,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:42,004 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:00:42,004 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 374 treesize of output 342 [2022-12-14 13:00:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:42,084 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:42,084 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 [2022-12-14 13:00:42,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:42,129 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:00:42,129 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 40 treesize of output 30 [2022-12-14 13:00:42,271 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-12-14 13:00:42,272 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 5 case distinctions, treesize of input 230 treesize of output 254 [2022-12-14 13:00:43,405 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:00:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:43,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:43,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:43,746 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:00:43,746 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 28 treesize of output 27 [2022-12-14 13:00:43,869 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:44,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '904#(and (not (< (+ |ULTIMATE.start_main_~pos~0#1| 1) ~SIZE~0)) (<= |ULTIMATE.start_main_~n~0#1| 2) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:44,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:44,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:44,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-12-14 13:00:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519544877] [2022-12-14 13:00:44,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:00:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:00:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:00:44,802 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2022-12-14 13:00:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:45,102 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-12-14 13:00:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:00:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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 23 [2022-12-14 13:00:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:45,103 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:00:45,103 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 13:00:45,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 13:00:45,104 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:45,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 57 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 13:00:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-12-14 13:00:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 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) [2022-12-14 13:00:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-12-14 13:00:45,111 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-12-14 13:00:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:45,111 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-12-14 13:00:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2022-12-14 13:00:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-12-14 13:00:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 13:00:45,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:45,112 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:45,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:45,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:45,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1702029489, now seen corresponding path program 1 times [2022-12-14 13:00:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:45,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344429676] [2022-12-14 13:00:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:45,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:00:45,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344429676] [2022-12-14 13:00:45,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344429676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:45,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659903894] [2022-12-14 13:00:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:45,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:45,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:45,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:45,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:00:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:00:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:00:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:00:45,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659903894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882775288] [2022-12-14 13:00:45,626 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:00:45,626 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:45,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:45,626 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:45,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,684 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:45,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:45,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:00:45,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:45,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:45,808 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:00:45,809 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 374 treesize of output 342 [2022-12-14 13:00:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:45,871 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:45,871 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 [2022-12-14 13:00:45,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:45,906 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:00:45,906 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 30 treesize of output 25 [2022-12-14 13:00:46,052 INFO L321 Elim1Store]: treesize reduction 142, result has 29.4 percent of original size [2022-12-14 13:00:46,053 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 225 treesize of output 240 [2022-12-14 13:00:47,224 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:00:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:47,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:47,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:47,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:47,572 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:00:47,572 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 28 treesize of output 27 [2022-12-14 13:00:47,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:47,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:00:47,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:47,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:48,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= |ULTIMATE.start_main_~n~0#1| 2) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:48,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:48,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:48,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-14 13:00:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226758115] [2022-12-14 13:00:48,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:48,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:00:48,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:00:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=713, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:00:48,391 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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) [2022-12-14 13:00:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:48,455 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2022-12-14 13:00:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:00:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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) Word has length 25 [2022-12-14 13:00:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:48,456 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:00:48,456 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:00:48,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=713, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:00:48,457 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:48,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:00:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:00:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-12-14 13:00:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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) [2022-12-14 13:00:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-12-14 13:00:48,464 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 25 [2022-12-14 13:00:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:48,465 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-12-14 13:00:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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) [2022-12-14 13:00:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-12-14 13:00:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:00:48,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:48,466 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:48,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:00:48,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:48,668 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1896076008, now seen corresponding path program 2 times [2022-12-14 13:00:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:48,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462422998] [2022-12-14 13:00:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:00:48,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462422998] [2022-12-14 13:00:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462422998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474949880] [2022-12-14 13:00:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:00:48,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:48,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:48,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:00:49,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:00:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:00:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:49,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-12-14 13:00:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 13:00:49,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:49,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-12-14 13:00:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 13:00:49,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474949880] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245965946] [2022-12-14 13:00:49,303 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:00:49,303 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:49,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:49,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:49,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,359 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:49,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:00:49,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:49,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:49,506 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:00:49,506 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 374 treesize of output 342 [2022-12-14 13:00:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:49,567 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:49,568 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 [2022-12-14 13:00:49,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:49,605 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:00:49,605 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 40 treesize of output 30 [2022-12-14 13:00:49,739 INFO L321 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-12-14 13:00:49,740 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 5 case distinctions, treesize of input 230 treesize of output 254 [2022-12-14 13:00:50,644 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:00:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:50,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:50,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:50,969 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:00:50,969 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 28 treesize of output 27 [2022-12-14 13:00:51,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:51,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:00:51,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:51,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:51,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1698#(and (<= |ULTIMATE.start_main_~n~0#1| 2) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:51,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:51,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:51,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-12-14 13:00:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530935319] [2022-12-14 13:00:51,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:00:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:00:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1103, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:00:51,746 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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) [2022-12-14 13:00:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:53,059 INFO L93 Difference]: Finished difference Result 387 states and 461 transitions. [2022-12-14 13:00:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 13:00:53,059 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 32 [2022-12-14 13:00:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:53,061 INFO L225 Difference]: With dead ends: 387 [2022-12-14 13:00:53,061 INFO L226 Difference]: Without dead ends: 359 [2022-12-14 13:00:53,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3043, Invalid=8299, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 13:00:53,063 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 928 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:53,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 143 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:00:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-12-14 13:00:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 73. [2022-12-14 13:00:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 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) [2022-12-14 13:00:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2022-12-14 13:00:53,079 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 32 [2022-12-14 13:00:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:53,079 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2022-12-14 13:00:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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) [2022-12-14 13:00:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2022-12-14 13:00:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 13:00:53,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:53,079 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:53,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:00:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:53,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:53,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash 676480349, now seen corresponding path program 3 times [2022-12-14 13:00:53,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:53,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205571612] [2022-12-14 13:00:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:53,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:00:53,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205571612] [2022-12-14 13:00:53,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205571612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143204770] [2022-12-14 13:00:53,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:00:53,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:53,623 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:53,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:00:53,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:00:53,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:00:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:00:53,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:53,803 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 13:00:53,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2022-12-14 13:00:53,867 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 13:00:53,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 66 [2022-12-14 13:00:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-12-14 13:00:53,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:54,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-12-14 13:00:54,171 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-12-14 13:00:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 137 [2022-12-14 13:00:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-12-14 13:00:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143204770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909511703] [2022-12-14 13:00:54,211 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:00:54,211 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:54,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:54,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:54,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,256 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:54,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:00:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:00:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:54,381 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:00:54,381 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 354 treesize of output 344 [2022-12-14 13:00:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:54,594 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:00:54,594 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 [2022-12-14 13:00:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:00:54,629 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:00:54,629 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 30 treesize of output 25 [2022-12-14 13:00:54,766 INFO L321 Elim1Store]: treesize reduction 137, result has 31.8 percent of original size [2022-12-14 13:00:54,766 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 225 treesize of output 245 [2022-12-14 13:00:55,582 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:00:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:55,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:00:55,912 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:00:55,912 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 28 treesize of output 27 [2022-12-14 13:00:56,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:56,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:00:56,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:00:56,087 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:56,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2785#(and (<= |ULTIMATE.start_main_~n~0#1| 2) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:00:56,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:00:56,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:00:56,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 35 [2022-12-14 13:00:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654385645] [2022-12-14 13:00:56,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:00:56,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:00:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:00:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:00:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1809, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 13:00:56,906 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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) [2022-12-14 13:00:58,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:58,788 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2022-12-14 13:00:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:00:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 38 [2022-12-14 13:00:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:58,789 INFO L225 Difference]: With dead ends: 189 [2022-12-14 13:00:58,789 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 13:00:58,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=643, Invalid=4049, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:00:58,792 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:58,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 167 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:00:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 13:00:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2022-12-14 13:00:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 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) [2022-12-14 13:00:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-12-14 13:00:58,813 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 38 [2022-12-14 13:00:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:58,813 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-12-14 13:00:58,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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) [2022-12-14 13:00:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-12-14 13:00:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 13:00:58,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:58,814 INFO L195 NwaCegarLoop]: trace histogram [17, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:00:58,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:00:59,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:59,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1006385879, now seen corresponding path program 1 times [2022-12-14 13:00:59,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:59,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259201357] [2022-12-14 13:00:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:00:59,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259201357] [2022-12-14 13:00:59,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259201357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868931593] [2022-12-14 13:00:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:59,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:59,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:59,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:59,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:00:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:00:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:00:59,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:00:59,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868931593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436642303] [2022-12-14 13:00:59,884 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:00:59,884 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:59,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:59,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:59,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:59,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,934 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:00:59,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:00:59,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:00:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:00:59,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:01:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:00,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:00,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:00,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:00,065 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:01:00,065 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 354 treesize of output 344 [2022-12-14 13:01:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:00,287 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:01:00,287 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 [2022-12-14 13:01:00,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:00,330 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:01:00,330 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 30 treesize of output 25 [2022-12-14 13:01:00,447 INFO L321 Elim1Store]: treesize reduction 142, result has 29.4 percent of original size [2022-12-14 13:01:00,447 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 225 treesize of output 240 [2022-12-14 13:01:01,354 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 13:01:01,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:01,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:01:01,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:01,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-12-14 13:01:01,721 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:01,722 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 28 treesize of output 27 [2022-12-14 13:01:01,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:01,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:01:01,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:01,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:02,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3636#(and (<= |ULTIMATE.start_main_~n~0#1| 2) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:01:02,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:02,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:02,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2022-12-14 13:01:02,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685074358] [2022-12-14 13:01:02,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 13:01:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 13:01:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=3238, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:01:02,670 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 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) [2022-12-14 13:01:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:02,758 INFO L93 Difference]: Finished difference Result 188 states and 254 transitions. [2022-12-14 13:01:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 13:01:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 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 [2022-12-14 13:01:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:02,759 INFO L225 Difference]: With dead ends: 188 [2022-12-14 13:01:02,759 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 13:01:02,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1454, Invalid=3238, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 13:01:02,760 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:02,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:01:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 13:01:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-12-14 13:01:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2272727272727273) internal successors, (135), 110 states have internal predecessors, (135), 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) [2022-12-14 13:01:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2022-12-14 13:01:02,784 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 42 [2022-12-14 13:01:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:02,784 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2022-12-14 13:01:02,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 55 states have internal predecessors, (74), 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) [2022-12-14 13:01:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2022-12-14 13:01:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 13:01:02,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:02,785 INFO L195 NwaCegarLoop]: trace histogram [36, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:02,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:02,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:01:02,987 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1484046656, now seen corresponding path program 2 times [2022-12-14 13:01:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129042618] [2022-12-14 13:01:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:01:03,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129042618] [2022-12-14 13:01:03,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129042618] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293021335] [2022-12-14 13:01:03,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:03,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:03,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:03,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:03,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:01:04,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:01:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:01:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-12-14 13:01:04,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-12-14 13:01:04,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293021335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137797340] [2022-12-14 13:01:04,276 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:01:04,277 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:04,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:04,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:04,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,338 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:01:04,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:01:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:01:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:01:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:04,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:04,459 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:01:04,459 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 374 treesize of output 342 [2022-12-14 13:01:04,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:04,521 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:01:04,521 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 [2022-12-14 13:01:04,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:04,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:04,667 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:01:04,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:01:04,935 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:04,935 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 28 treesize of output 27 [2022-12-14 13:01:05,110 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:05,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:05,707 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:05,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:06,082 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-12-14 13:01:06,082 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 5 case distinctions, treesize of input 99 treesize of output 124 [2022-12-14 13:01:06,130 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:06,131 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:06,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:07,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4612#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:01:07,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:07,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:07,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 5, 5] total 46 [2022-12-14 13:01:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535703027] [2022-12-14 13:01:07,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:07,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 13:01:07,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 13:01:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=2683, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:01:07,617 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 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) [2022-12-14 13:01:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:08,881 INFO L93 Difference]: Finished difference Result 453 states and 538 transitions. [2022-12-14 13:01:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 13:01:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 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 [2022-12-14 13:01:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:08,883 INFO L225 Difference]: With dead ends: 453 [2022-12-14 13:01:08,883 INFO L226 Difference]: Without dead ends: 380 [2022-12-14 13:01:08,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2363, Invalid=7339, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 13:01:08,885 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 923 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:08,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 159 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:01:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-12-14 13:01:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 140. [2022-12-14 13:01:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2661870503597121) internal successors, (176), 139 states have internal predecessors, (176), 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) [2022-12-14 13:01:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2022-12-14 13:01:08,922 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 61 [2022-12-14 13:01:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:08,922 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2022-12-14 13:01:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 46 states have internal predecessors, (77), 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) [2022-12-14 13:01:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2022-12-14 13:01:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 13:01:08,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:08,923 INFO L195 NwaCegarLoop]: trace histogram [37, 6, 6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:01:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:01:09,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1720770711, now seen corresponding path program 3 times [2022-12-14 13:01:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:09,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803459457] [2022-12-14 13:01:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 13:01:10,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:10,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803459457] [2022-12-14 13:01:10,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803459457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:10,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411316164] [2022-12-14 13:01:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:01:10,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:10,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:10,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:01:10,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:01:10,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 13:01:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:10,631 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-12-14 13:01:10,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 66 [2022-12-14 13:01:10,737 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-12-14 13:01:10,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 68 [2022-12-14 13:01:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-12-14 13:01:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:11,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-12-14 13:01:11,157 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-12-14 13:01:11,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 149 [2022-12-14 13:01:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-12-14 13:01:11,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411316164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:11,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230294893] [2022-12-14 13:01:11,184 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:01:11,184 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:11,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:11,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:11,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,236 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:01:11,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:01:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:01:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:01:11,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:11,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,376 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:01:11,377 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 354 treesize of output 344 [2022-12-14 13:01:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,583 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:01:11,584 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 [2022-12-14 13:01:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:11,728 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:01:11,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:01:11,929 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:11,929 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 28 treesize of output 27 [2022-12-14 13:01:12,090 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:12,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:12,355 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:12,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:12,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:12,656 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-12-14 13:01:12,656 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 5 case distinctions, treesize of input 99 treesize of output 124 [2022-12-14 13:01:12,677 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:12,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:12,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:14,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6155#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:01:14,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:14,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:14,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12, 12] total 57 [2022-12-14 13:01:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364565940] [2022-12-14 13:01:14,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:01:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:01:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=3914, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:01:14,026 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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) [2022-12-14 13:01:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:17,789 INFO L93 Difference]: Finished difference Result 284 states and 358 transitions. [2022-12-14 13:01:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 13:01:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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 74 [2022-12-14 13:01:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:17,791 INFO L225 Difference]: With dead ends: 284 [2022-12-14 13:01:17,791 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 13:01:17,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1235, Invalid=6955, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 13:01:17,792 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:17,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 148 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:01:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 13:01:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-12-14 13:01:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2567567567567568) internal successors, (186), 148 states have internal predecessors, (186), 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) [2022-12-14 13:01:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2022-12-14 13:01:17,828 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 74 [2022-12-14 13:01:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:17,828 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2022-12-14 13:01:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 57 states have internal predecessors, (91), 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) [2022-12-14 13:01:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2022-12-14 13:01:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 13:01:17,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:17,829 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:17,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:01:18,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:18,030 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash 499347990, now seen corresponding path program 4 times [2022-12-14 13:01:18,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:18,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932575261] [2022-12-14 13:01:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:01:19,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932575261] [2022-12-14 13:01:19,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932575261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748591587] [2022-12-14 13:01:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:01:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:19,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:19,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:19,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:01:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 13:01:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:01:20,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:01:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748591587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161493788] [2022-12-14 13:01:21,577 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:01:21,577 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:21,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:21,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:21,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:21,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,622 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:01:21,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:01:21,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:01:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:01:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:21,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:21,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:21,758 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:01:21,758 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 354 treesize of output 344 [2022-12-14 13:01:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:21,954 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:01:21,954 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 [2022-12-14 13:01:22,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:22,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:22,110 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:01:22,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:01:22,329 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:22,329 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 28 treesize of output 27 [2022-12-14 13:01:22,479 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:22,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:22,929 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:01:22,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:01:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:23,126 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-12-14 13:01:23,127 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 5 case distinctions, treesize of input 99 treesize of output 124 [2022-12-14 13:01:23,153 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:23,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:23,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:24,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7554#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:01:24,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:24,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 118 [2022-12-14 13:01:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770407681] [2022-12-14 13:01:24,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:24,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-12-14 13:01:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:24,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-12-14 13:01:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6714, Invalid=10316, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 13:01:24,043 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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) [2022-12-14 13:01:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:01:24,247 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2022-12-14 13:01:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 13:01:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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 75 [2022-12-14 13:01:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:01:24,248 INFO L225 Difference]: With dead ends: 303 [2022-12-14 13:01:24,248 INFO L226 Difference]: Without dead ends: 194 [2022-12-14 13:01:24,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8429 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6714, Invalid=10316, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 13:01:24,250 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:01:24,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:01:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-12-14 13:01:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 189. [2022-12-14 13:01:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.202127659574468) internal successors, (226), 188 states have internal predecessors, (226), 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) [2022-12-14 13:01:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2022-12-14 13:01:24,291 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 75 [2022-12-14 13:01:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:01:24,292 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2022-12-14 13:01:24,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.134453781512605) internal successors, (135), 118 states have internal predecessors, (135), 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) [2022-12-14 13:01:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2022-12-14 13:01:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 13:01:24,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:01:24,293 INFO L195 NwaCegarLoop]: trace histogram [78, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:01:24,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:01:24,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:24,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:01:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:01:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash -832595050, now seen corresponding path program 5 times [2022-12-14 13:01:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:01:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291469905] [2022-12-14 13:01:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:01:24,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:01:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:01:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:01:28,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:01:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291469905] [2022-12-14 13:01:28,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291469905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:01:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934783593] [2022-12-14 13:01:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:01:28,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:01:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:01:28,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:01:28,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:01:28,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:01:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:01:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:01:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:01:28,732 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 13:01:28,732 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 24 treesize of output 29 [2022-12-14 13:01:28,787 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 13:01:28,787 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 28 treesize of output 33 [2022-12-14 13:01:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-12-14 13:01:28,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:01:33,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-14 13:01:33,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:01:33,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 132 [2022-12-14 13:01:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3142 trivial. 0 not checked. [2022-12-14 13:01:34,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934783593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:01:34,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527716990] [2022-12-14 13:01:34,226 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:01:34,226 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:01:34,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:01:34,226 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:01:34,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:01:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,280 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:01:34,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:01:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:01:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:01:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:01:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:34,410 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:01:34,410 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 374 treesize of output 342 [2022-12-14 13:01:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:34,466 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:01:34,466 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 [2022-12-14 13:01:34,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:34,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:01:34,606 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:01:34,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:01:34,962 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:34,962 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 28 treesize of output 27 [2022-12-14 13:01:35,128 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:01:35,129 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 28 treesize of output 27 [2022-12-14 13:01:35,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:35,286 INFO L321 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-12-14 13:01:35,286 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 5 case distinctions, treesize of input 99 treesize of output 124 [2022-12-14 13:01:35,320 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:35,321 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2022-12-14 13:01:35,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:01:35,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:01:36,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9267#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:01:36,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:01:36,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:36,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 10, 10] total 98 [2022-12-14 13:01:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632461901] [2022-12-14 13:01:36,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:01:36,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 13:01:36,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:36,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 13:01:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3876, Invalid=8331, Unknown=3, NotChecked=0, Total=12210 [2022-12-14 13:01:36,418 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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) [2022-12-14 13:02:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:00,210 INFO L93 Difference]: Finished difference Result 888 states and 1038 transitions. [2022-12-14 13:02:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 342 states. [2022-12-14 13:02:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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 115 [2022-12-14 13:02:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:00,215 INFO L225 Difference]: With dead ends: 888 [2022-12-14 13:02:00,215 INFO L226 Difference]: Without dead ends: 779 [2022-12-14 13:02:00,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65036 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=40858, Invalid=156716, Unknown=6, NotChecked=0, Total=197580 [2022-12-14 13:02:00,225 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2381 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:00,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2381 Valid, 314 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 13:02:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-12-14 13:02:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 196. [2022-12-14 13:02:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 states have internal predecessors, (237), 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) [2022-12-14 13:02:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2022-12-14 13:02:00,275 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 115 [2022-12-14 13:02:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:00,275 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2022-12-14 13:02:00,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 98 states have internal predecessors, (135), 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) [2022-12-14 13:02:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2022-12-14 13:02:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 13:02:00,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:00,276 INFO L195 NwaCegarLoop]: trace histogram [79, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:00,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:02:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:02:00,477 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1555217239, now seen corresponding path program 4 times [2022-12-14 13:02:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:00,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640452077] [2022-12-14 13:02:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:02:03,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640452077] [2022-12-14 13:02:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640452077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781125155] [2022-12-14 13:02:03,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:02:03,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:03,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:03,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:03,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:02:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:02:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:02:06,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:02:11,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781125155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:11,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948719157] [2022-12-14 13:02:11,646 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:02:11,646 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:11,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:11,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:11,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,693 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:02:11,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:02:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,734 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:02:11,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:02:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:02:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:11,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:11,844 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:02:11,845 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 354 treesize of output 344 [2022-12-14 13:02:12,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:12,050 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:02:12,050 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 [2022-12-14 13:02:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:12,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:12,215 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:02:12,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:02:12,514 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:02:12,514 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 28 treesize of output 27 [2022-12-14 13:02:12,676 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:02:12,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:02:12,934 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:02:12,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:02:13,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:02:13,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:02:13,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:02:13,350 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:14,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12574#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:02:14,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:14,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:14,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 241 [2022-12-14 13:02:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588412670] [2022-12-14 13:02:14,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2022-12-14 13:02:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2022-12-14 13:02:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26130, Invalid=38640, Unknown=0, NotChecked=0, Total=64770 [2022-12-14 13:02:14,906 INFO L87 Difference]: Start difference. First operand 196 states and 237 transitions. Second operand has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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) [2022-12-14 13:02:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:15,407 INFO L93 Difference]: Finished difference Result 396 states and 558 transitions. [2022-12-14 13:02:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-12-14 13:02:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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 118 [2022-12-14 13:02:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:15,408 INFO L225 Difference]: With dead ends: 396 [2022-12-14 13:02:15,409 INFO L226 Difference]: Without dead ends: 281 [2022-12-14 13:02:15,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30564 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=26130, Invalid=38640, Unknown=0, NotChecked=0, Total=64770 [2022-12-14 13:02:15,411 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:15,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:02:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-14 13:02:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2022-12-14 13:02:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1521739130434783) internal successors, (318), 276 states have internal predecessors, (318), 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) [2022-12-14 13:02:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-12-14 13:02:15,480 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 118 [2022-12-14 13:02:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:02:15,480 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-12-14 13:02:15,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 1.0743801652892562) internal successors, (260), 241 states have internal predecessors, (260), 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) [2022-12-14 13:02:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-12-14 13:02:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-12-14 13:02:15,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:02:15,482 INFO L195 NwaCegarLoop]: trace histogram [160, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:02:15,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:02:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:02:15,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:02:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:02:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash -116954400, now seen corresponding path program 5 times [2022-12-14 13:02:15,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:02:15,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371107544] [2022-12-14 13:02:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:02:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:02:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:02:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:02:29,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:02:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371107544] [2022-12-14 13:02:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371107544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:02:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849029573] [2022-12-14 13:02:29,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:02:29,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:02:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:02:29,799 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:02:29,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:02:30,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:02:30,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:02:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:02:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:02:30,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-12-14 13:02:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-12-14 13:02:30,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:02:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12951 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12933 trivial. 0 not checked. [2022-12-14 13:02:31,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849029573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:02:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316903332] [2022-12-14 13:02:31,617 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:02:31,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:02:31,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:02:31,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:02:31,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:02:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,655 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:02:31,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:02:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,701 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:02:31,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:02:31,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:02:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:02:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:31,829 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:02:31,829 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 354 treesize of output 344 [2022-12-14 13:02:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:32,059 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:02:32,059 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 [2022-12-14 13:02:32,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:32,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:02:32,197 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:02:32,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:02:32,566 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:02:32,566 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 28 treesize of output 27 [2022-12-14 13:02:32,722 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:02:32,722 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 28 treesize of output 27 [2022-12-14 13:02:32,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:02:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:02:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:02:32,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:02:34,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15239#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:02:34,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:02:34,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:02:34,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 12, 12] total 183 [2022-12-14 13:02:34,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142139277] [2022-12-14 13:02:34,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:02:34,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2022-12-14 13:02:34,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:02:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2022-12-14 13:02:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15587, Invalid=23025, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 13:02:34,865 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 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) [2022-12-14 13:04:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:55,510 INFO L93 Difference]: Finished difference Result 3723 states and 4441 transitions. [2022-12-14 13:04:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2022-12-14 13:04:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 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 199 [2022-12-14 13:04:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:55,520 INFO L225 Difference]: With dead ends: 3723 [2022-12-14 13:04:55,520 INFO L226 Difference]: Without dead ends: 3605 [2022-12-14 13:04:55,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243259 ImplicationChecksByTransitivity, 88.5s TimeCoverageRelationStatistics Valid=218747, Invalid=528613, Unknown=0, NotChecked=0, Total=747360 [2022-12-14 13:04:55,559 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11829 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 3566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11829 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 5050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3566 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:55,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11829 Valid, 1072 Invalid, 5050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3566 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 13:04:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2022-12-14 13:04:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 894. [2022-12-14 13:04:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.2161254199328106) internal successors, (1086), 893 states have internal predecessors, (1086), 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) [2022-12-14 13:04:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1086 transitions. [2022-12-14 13:04:56,368 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1086 transitions. Word has length 199 [2022-12-14 13:04:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:56,369 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1086 transitions. [2022-12-14 13:04:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.184782608695652) internal successors, (218), 183 states have internal predecessors, (218), 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) [2022-12-14 13:04:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1086 transitions. [2022-12-14 13:04:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-12-14 13:04:56,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:56,370 INFO L195 NwaCegarLoop]: trace histogram [166, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:56,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:04:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:56,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1178227128, now seen corresponding path program 6 times [2022-12-14 13:04:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:56,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944028569] [2022-12-14 13:04:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 13:05:11,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944028569] [2022-12-14 13:05:11,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944028569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243097737] [2022-12-14 13:05:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:05:11,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:11,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:11,788 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:11,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:05:12,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:05:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 13:05:12,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:12,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:05:12,874 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 3 case distinctions, treesize of input 41 treesize of output 37 [2022-12-14 13:05:12,969 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-12-14 13:05:12,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 13:05:13,092 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-12-14 13:05:13,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 13:05:13,209 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-12-14 13:05:13,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 13:05:13,289 INFO L321 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2022-12-14 13:05:13,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 13:05:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13912 trivial. 0 not checked. [2022-12-14 13:05:13,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:26,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2022-12-14 13:09:26,632 INFO L321 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2022-12-14 13:09:26,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6440 treesize of output 4629 [2022-12-14 13:09:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13948 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13912 trivial. 0 not checked. [2022-12-14 13:09:26,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243097737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:26,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620895539] [2022-12-14 13:09:26,915 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 13:09:26,915 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:26,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:26,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:26,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,960 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:09:26,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:09:26,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:09:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:26,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:09:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:27,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,087 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:09:27,087 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 354 treesize of output 344 [2022-12-14 13:09:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,286 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:09:27,286 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 [2022-12-14 13:09:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:09:27,409 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:09:27,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:09:27,676 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:09:27,676 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 28 treesize of output 27 [2022-12-14 13:09:27,852 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:09:27,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:09:28,367 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:09:28,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:09:28,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:09:28,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:09:28,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:09:28,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:31,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25004#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:09:31,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:31,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:09:31,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 17, 17] total 199 [2022-12-14 13:09:31,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100259611] [2022-12-14 13:09:31,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:31,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2022-12-14 13:09:31,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2022-12-14 13:09:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14977, Invalid=28967, Unknown=366, NotChecked=0, Total=44310 [2022-12-14 13:09:31,186 INFO L87 Difference]: Start difference. First operand 894 states and 1086 transitions. Second operand has 199 states, 199 states have (on average 1.1407035175879396) internal successors, (227), 199 states have internal predecessors, (227), 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) [2022-12-14 13:09:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:58,760 INFO L93 Difference]: Finished difference Result 1708 states and 2099 transitions. [2022-12-14 13:09:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-14 13:09:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 1.1407035175879396) internal successors, (227), 199 states have internal predecessors, (227), 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 206 [2022-12-14 13:09:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:58,764 INFO L225 Difference]: With dead ends: 1708 [2022-12-14 13:09:58,764 INFO L226 Difference]: Without dead ends: 982 [2022-12-14 13:09:58,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9123 ImplicationChecksByTransitivity, 288.1s TimeCoverageRelationStatistics Valid=15892, Invalid=45493, Unknown=367, NotChecked=0, Total=61752 [2022-12-14 13:09:58,767 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 399 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 121 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:58,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 286 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1331 Invalid, 2 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 13:09:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-12-14 13:09:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 905. [2022-12-14 13:09:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.2134955752212389) internal successors, (1097), 904 states have internal predecessors, (1097), 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) [2022-12-14 13:09:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1097 transitions. [2022-12-14 13:09:59,387 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1097 transitions. Word has length 206 [2022-12-14 13:09:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:59,387 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1097 transitions. [2022-12-14 13:09:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 1.1407035175879396) internal successors, (227), 199 states have internal predecessors, (227), 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) [2022-12-14 13:09:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1097 transitions. [2022-12-14 13:09:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 13:09:59,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:59,397 INFO L195 NwaCegarLoop]: trace histogram [167, 6, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:59,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:09:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:09:59,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1618628980, now seen corresponding path program 6 times [2022-12-14 13:09:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171121123] [2022-12-14 13:09:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14108 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 13:10:13,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:10:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171121123] [2022-12-14 13:10:13,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171121123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:10:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100199860] [2022-12-14 13:10:13,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:10:13,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:10:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:10:13,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:10:13,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:10:14,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:10:14,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:10:14,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 13:10:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:10:15,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:10:15,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2022-12-14 13:10:15,272 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-12-14 13:10:15,273 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 46 treesize of output 51 [2022-12-14 13:10:15,417 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-12-14 13:10:15,418 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 46 treesize of output 51 [2022-12-14 13:10:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14108 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 14079 trivial. 0 not checked. [2022-12-14 13:10:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:40,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2022-12-14 13:10:40,138 INFO L321 Elim1Store]: treesize reduction 15, result has 68.1 percent of original size [2022-12-14 13:10:40,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3557 treesize of output 2587 [2022-12-14 13:10:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14108 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 14079 trivial. 0 not checked. [2022-12-14 13:10:40,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100199860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:10:40,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931543524] [2022-12-14 13:10:40,442 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:10:40,442 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:10:40,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:10:40,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:10:40,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:10:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,483 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:10:40,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:10:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,532 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:10:40,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:10:40,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:10:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,647 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:10:40,648 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 354 treesize of output 344 [2022-12-14 13:10:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,842 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:10:40,842 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 [2022-12-14 13:10:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:10:40,981 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:10:40,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:10:41,286 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:10:41,286 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 28 treesize of output 27 [2022-12-14 13:10:41,447 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:10:41,447 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 28 treesize of output 27 [2022-12-14 13:10:41,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:10:41,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:10:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:10:41,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:10:44,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31625#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:10:44,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:10:44,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:10:44,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 16, 16] total 198 [2022-12-14 13:10:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296854823] [2022-12-14 13:10:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:10:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-12-14 13:10:44,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:10:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-12-14 13:10:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14597, Invalid=29707, Unknown=6, NotChecked=0, Total=44310 [2022-12-14 13:10:44,669 INFO L87 Difference]: Start difference. First operand 905 states and 1097 transitions. Second operand has 198 states, 198 states have (on average 1.1717171717171717) internal successors, (232), 198 states have internal predecessors, (232), 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) [2022-12-14 13:11:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:11:26,588 INFO L93 Difference]: Finished difference Result 1873 states and 2258 transitions. [2022-12-14 13:11:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2022-12-14 13:11:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 1.1717171717171717) internal successors, (232), 198 states have internal predecessors, (232), 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 208 [2022-12-14 13:11:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:11:26,590 INFO L225 Difference]: With dead ends: 1873 [2022-12-14 13:11:26,591 INFO L226 Difference]: Without dead ends: 1137 [2022-12-14 13:11:26,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8492 ImplicationChecksByTransitivity, 74.4s TimeCoverageRelationStatistics Valid=15577, Invalid=46167, Unknown=8, NotChecked=0, Total=61752 [2022-12-14 13:11:26,594 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 222 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:11:26,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 271 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1239 Invalid, 2 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 13:11:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-12-14 13:11:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 904. [2022-12-14 13:11:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.2115171650055372) internal successors, (1094), 903 states have internal predecessors, (1094), 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) [2022-12-14 13:11:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1094 transitions. [2022-12-14 13:11:27,333 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1094 transitions. Word has length 208 [2022-12-14 13:11:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:11:27,333 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1094 transitions. [2022-12-14 13:11:27,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 1.1717171717171717) internal successors, (232), 198 states have internal predecessors, (232), 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) [2022-12-14 13:11:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1094 transitions. [2022-12-14 13:11:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-12-14 13:11:27,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:11:27,335 INFO L195 NwaCegarLoop]: trace histogram [168, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:11:27,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 13:11:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:11:27,536 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:11:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:11:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 253305480, now seen corresponding path program 7 times [2022-12-14 13:11:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:11:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764367913] [2022-12-14 13:11:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:11:27,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:11:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:11:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 13:11:43,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:11:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764367913] [2022-12-14 13:11:43,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764367913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:11:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297047278] [2022-12-14 13:11:43,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:11:43,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:11:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:11:43,520 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:11:43,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:11:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:11:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 171 conjunts are in the unsatisfiable core [2022-12-14 13:11:44,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:11:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 13:11:54,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14281 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 13:12:20,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297047278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816618275] [2022-12-14 13:12:20,460 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:12:20,460 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:12:20,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:12:20,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:12:20,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:12:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,517 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:12:20,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:12:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 13:12:20,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:12:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:20,643 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 13:12:20,643 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 354 treesize of output 344 [2022-12-14 13:12:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:20,860 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:12:20,860 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 [2022-12-14 13:12:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:21,006 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:12:21,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:12:21,245 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:12:21,245 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 28 treesize of output 27 [2022-12-14 13:12:21,407 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:12:21,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:12:21,666 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:12:21,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:12:21,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:12:21,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:12:21,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:12:22,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:12:24,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38905#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:12:24,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:12:24,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:12:24,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 170, 170] total 508 [2022-12-14 13:12:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512432302] [2022-12-14 13:12:24,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 509 states [2022-12-14 13:12:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:12:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 509 interpolants. [2022-12-14 13:12:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115308, Invalid=156654, Unknown=0, NotChecked=0, Total=271962 [2022-12-14 13:12:24,565 INFO L87 Difference]: Start difference. First operand 904 states and 1094 transitions. Second operand has 509 states, 509 states have (on average 1.0353634577603144) internal successors, (527), 508 states have internal predecessors, (527), 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) [2022-12-14 13:12:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:12:27,613 INFO L93 Difference]: Finished difference Result 1813 states and 2362 transitions. [2022-12-14 13:12:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 340 states. [2022-12-14 13:12:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 509 states, 509 states have (on average 1.0353634577603144) internal successors, (527), 508 states have internal predecessors, (527), 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 212 [2022-12-14 13:12:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:12:27,616 INFO L225 Difference]: With dead ends: 1813 [2022-12-14 13:12:27,616 INFO L226 Difference]: Without dead ends: 1079 [2022-12-14 13:12:27,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 520 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124726 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=115308, Invalid=156654, Unknown=0, NotChecked=0, Total=271962 [2022-12-14 13:12:27,626 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:12:27,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:12:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-12-14 13:12:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1074. [2022-12-14 13:12:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 1.1780055917986954) internal successors, (1264), 1073 states have internal predecessors, (1264), 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) [2022-12-14 13:12:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1264 transitions. [2022-12-14 13:12:28,376 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1264 transitions. Word has length 212 [2022-12-14 13:12:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:12:28,376 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1264 transitions. [2022-12-14 13:12:28,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 509 states, 509 states have (on average 1.0353634577603144) internal successors, (527), 508 states have internal predecessors, (527), 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) [2022-12-14 13:12:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1264 transitions. [2022-12-14 13:12:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-12-14 13:12:28,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:12:28,378 INFO L195 NwaCegarLoop]: trace histogram [338, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:12:28,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:12:28,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:28,579 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:12:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:12:28,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1531893208, now seen corresponding path program 8 times [2022-12-14 13:12:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:12:28,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088075111] [2022-12-14 13:12:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:12:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:12:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:13:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 57376 backedges. 0 proven. 57291 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 13:13:32,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:13:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088075111] [2022-12-14 13:13:32,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088075111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:13:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131211558] [2022-12-14 13:13:32,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:13:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:13:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:13:32,522 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:13:32,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4845a57-ef03-4072-9090-8bd676e3ca0a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:13:33,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:13:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:13:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 13:13:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:13:34,612 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 13:13:34,612 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 26 treesize of output 31 [2022-12-14 13:13:34,787 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 13:13:34,787 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 30 treesize of output 35 [2022-12-14 13:13:34,966 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-14 13:13:34,966 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 30 treesize of output 35 [2022-12-14 13:13:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 57376 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 57345 trivial. 0 not checked. [2022-12-14 13:13:35,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:14:29,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 13:14:29,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:14:29,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 362 treesize of output 268 [2022-12-14 13:14:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 57376 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 57345 trivial. 0 not checked. [2022-12-14 13:14:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131211558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:14:30,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305445313] [2022-12-14 13:14:30,337 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 13:14:30,337 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:14:30,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:14:30,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:14:30,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:14:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,382 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-12-14 13:14:30,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-12-14 13:14:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,433 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 13:14:30,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 13:14:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 [2022-12-14 13:14:30,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:14:30,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:14:30,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:14:30,534 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 13:14:30,534 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 374 treesize of output 342 [2022-12-14 13:14:30,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:14:30,588 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 13:14:30,588 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 [2022-12-14 13:14:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:14:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:14:30,722 INFO L321 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-12-14 13:14:30,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 214 [2022-12-14 13:14:30,942 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-12-14 13:14:30,942 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 28 treesize of output 27 [2022-12-14 13:14:31,101 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:14:31,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:14:31,689 INFO L321 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-12-14 13:14:31,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 236 [2022-12-14 13:14:31,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:14:32,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2022-12-14 13:14:32,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 13:14:32,113 INFO L180 IcfgInterpreter]: Interpretation finished