./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI --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 a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 --- 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-5e519f3 [2022-11-03 01:35:33,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:35:33,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:35:33,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:35:33,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:35:33,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:35:33,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:35:33,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:35:33,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:35:33,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:35:33,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:35:33,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:35:33,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:35:33,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:35:33,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:35:33,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:35:33,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:35:33,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:35:33,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:35:33,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:35:33,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:35:33,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:35:33,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:35:33,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:35:33,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:35:33,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:35:33,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:35:33,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:35:33,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:35:33,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:35:33,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:35:33,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:35:33,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:35:33,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:35:33,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:35:33,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:35:33,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:35:33,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:35:33,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:35:33,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:35:33,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:35:33,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:35:33,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:35:33,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:35:33,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:35:33,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:35:33,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:35:33,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:35:33,194 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:35:33,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:35:33,195 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:35:33,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:35:33,196 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:35:33,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:35:33,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:35:33,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:35:33,197 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:35:33,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:35:33,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:35:33,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:35:33,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:35:33,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:35:33,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:35:33,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:35:33,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:35:33,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:35:33,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:35:33,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:35:33,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:35:33,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:35:33,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:35:33,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:35:33,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:35:33,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:35:33,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:35:33,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:35:33,203 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:35:33,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:35:33,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:35:33,204 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:35:33,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:35:33,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:35:33,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:35:33,205 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_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a70897b8f9d01ade64d517ee2bf20dd64d1adb0a94ea95e1a8b2431f33b62533 [2022-11-03 01:35:33,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:35:33,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:35:33,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:35:33,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:35:33,546 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:35:33,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-tiling/rewnifrev2.c [2022-11-03 01:35:33,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/data/3deb1f1ca/7011ef7f08f64bc88ad38caba6f5881c/FLAG88af97aa6 [2022-11-03 01:35:34,060 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:35:34,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/sv-benchmarks/c/array-tiling/rewnifrev2.c [2022-11-03 01:35:34,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/data/3deb1f1ca/7011ef7f08f64bc88ad38caba6f5881c/FLAG88af97aa6 [2022-11-03 01:35:34,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/data/3deb1f1ca/7011ef7f08f64bc88ad38caba6f5881c [2022-11-03 01:35:34,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:35:34,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:35:34,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:35:34,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:35:34,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:35:34,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b7a4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34, skipping insertion in model container [2022-11-03 01:35:34,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:35:34,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:35:34,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2022-11-03 01:35:34,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:35:34,767 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:35:34,784 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] [2022-11-03 01:35:34,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:35:34,815 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:35:34,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34 WrapperNode [2022-11-03 01:35:34,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:35:34,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:35:34,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:35:34,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:35:34,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,856 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-11-03 01:35:34,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:35:34,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:35:34,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:35:34,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:35:34,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:35:34,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:35:34,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:35:34,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:35:34,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (1/1) ... [2022-11-03 01:35:34,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:35:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:34,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:35:34,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:35:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:35:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:35:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:35:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:35:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:35:34,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:35:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:35:35,050 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:35:35,052 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:35:35,216 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:35:35,255 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:35:35,255 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:35:35,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:35 BoogieIcfgContainer [2022-11-03 01:35:35,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:35:35,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:35:35,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:35:35,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:35:35,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:35:34" (1/3) ... [2022-11-03 01:35:35,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537918ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:35, skipping insertion in model container [2022-11-03 01:35:35,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:35:34" (2/3) ... [2022-11-03 01:35:35,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537918ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:35:35, skipping insertion in model container [2022-11-03 01:35:35,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:35:35" (3/3) ... [2022-11-03 01:35:35,276 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2022-11-03 01:35:35,313 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:35:35,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:35:35,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:35:35,405 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;@2095c0c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:35:35,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:35:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) [2022-11-03 01:35:35,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:35:35,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:35,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:35:35,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1912434953, now seen corresponding path program 1 times [2022-11-03 01:35:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531419721] [2022-11-03 01:35:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:35,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531419721] [2022-11-03 01:35:35,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531419721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:35,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:35:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608827086] [2022-11-03 01:35:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:35:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:35:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:35:35,795 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:35,831 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-03 01:35:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:35:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-03 01:35:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:35,855 INFO L225 Difference]: With dead ends: 20 [2022-11-03 01:35:35,855 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 01:35:35,858 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 [2022-11-03 01:35:35,866 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:35,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 01:35:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-03 01:35:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-11-03 01:35:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-03 01:35:35,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-11-03 01:35:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:35,900 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-03 01:35:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-03 01:35:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:35:35,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:35,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:35:35,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash 840302022, now seen corresponding path program 1 times [2022-11-03 01:35:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746724737] [2022-11-03 01:35:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:36,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:36,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746724737] [2022-11-03 01:35:36,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746724737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:35:36,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:35:36,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:35:36,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485353465] [2022-11-03 01:35:36,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:35:36,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:35:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:35:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:35:36,367 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:36,430 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-03 01:35:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:35:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2022-11-03 01:35:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:36,431 INFO L225 Difference]: With dead ends: 14 [2022-11-03 01:35:36,432 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:35:36,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:35:36,433 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:36,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:35:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-03 01:35:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-03 01:35:36,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-11-03 01:35:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:36,439 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-03 01:35:36,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-03 01:35:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:35:36,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:36,440 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:36,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:35:36,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1921650230, now seen corresponding path program 1 times [2022-11-03 01:35:36,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:36,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991657485] [2022-11-03 01:35:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:36,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:36,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991657485] [2022-11-03 01:35:36,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991657485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757492930] [2022-11-03 01:35:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:36,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:36,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:35:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:35:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:36,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 01:35:37,291 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-03 01:35:37,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 12 [2022-11-03 01:35:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:37,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:37,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757492930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856573027] [2022-11-03 01:35:37,492 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:35:37,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:37,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:37,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:37,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:37,669 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 01:35:37,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 01:35:37,763 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 01:35:37,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 01:35:37,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-03 01:35:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:38,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:38,023 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 01:35:38,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 268 [2022-11-03 01:35:38,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 01:35:38,350 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:38,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:38,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:38,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:38,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-03 01:35:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265046358] [2022-11-03 01:35:38,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:35:38,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:35:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:35:38,853 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:39,068 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-03 01:35:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:35:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:35:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:39,071 INFO L225 Difference]: With dead ends: 18 [2022-11-03 01:35:39,071 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 01:35:39,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:35:39,073 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:39,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 01:35:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 01:35:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-03 01:35:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-03 01:35:39,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-03 01:35:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:39,081 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-03 01:35:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-03 01:35:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:35:39,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:39,083 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:35:39,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:35:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:39,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash -257732794, now seen corresponding path program 2 times [2022-11-03 01:35:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822491620] [2022-11-03 01:35:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:39,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:39,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822491620] [2022-11-03 01:35:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822491620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786078427] [2022-11-03 01:35:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:35:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:39,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:39,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:35:39,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:35:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:35:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:35:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:39,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786078427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727109474] [2022-11-03 01:35:39,666 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:35:39,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:39,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:39,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:39,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:39,749 INFO L356 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-03 01:35:39,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-03 01:35:39,814 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 01:35:39,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 01:35:39,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-03 01:35:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:39,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:39,988 INFO L356 Elim1Store]: treesize reduction 226, result has 11.7 percent of original size [2022-11-03 01:35:39,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 276 treesize of output 278 [2022-11-03 01:35:40,073 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 9 iterations. Over-approximation may be very coarse. [2022-11-03 01:35:40,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 01:35:40,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:40,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '310#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:40,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:40,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-03 01:35:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597336893] [2022-11-03 01:35:40,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:35:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:35:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:35:40,457 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:40,504 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-11-03 01:35:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:35:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 [2022-11-03 01:35:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:40,505 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:35:40,505 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:35:40,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:35:40,507 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:40,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:35:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:35:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 01:35:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 01:35:40,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2022-11-03 01:35:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:40,516 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 01:35:40,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 01:35:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:35:40,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:40,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:35:40,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:35:40,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:40,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash -510957161, now seen corresponding path program 3 times [2022-11-03 01:35:40,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:40,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087033232] [2022-11-03 01:35:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:41,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087033232] [2022-11-03 01:35:41,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087033232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:41,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591514629] [2022-11-03 01:35:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:35:41,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:41,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:41,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:41,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:35:41,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:35:41,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:35:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:35:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:41,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-03 01:35:41,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 38 treesize of output 41 [2022-11-03 01:35:41,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-11-03 01:35:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:41,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:41,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591514629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667363899] [2022-11-03 01:35:41,484 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:35:41,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:41,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:41,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:41,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:41,557 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 01:35:41,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 01:35:41,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:35:41,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-03 01:35:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:41,700 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 01:35:41,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 268 [2022-11-03 01:35:41,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 01:35:41,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:42,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:42,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:42,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:42,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-03 01:35:42,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844029705] [2022-11-03 01:35:42,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:42,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:35:42,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:35:42,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:35:42,169 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2022-11-03 01:35:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:42,455 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-03 01:35:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:35:42,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) Word has length 14 [2022-11-03 01:35:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:42,457 INFO L225 Difference]: With dead ends: 22 [2022-11-03 01:35:42,457 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:35:42,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:35:42,458 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:42,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 74 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-11-03 01:35:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:35:42,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-03 01:35:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-03 01:35:42,478 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-11-03 01:35:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:42,478 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-03 01:35:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2022-11-03 01:35:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-03 01:35:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:35:42,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:42,479 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-03 01:35:42,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:35:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:42,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash -555505575, now seen corresponding path program 4 times [2022-11-03 01:35:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865277770] [2022-11-03 01:35:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:42,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865277770] [2022-11-03 01:35:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865277770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316502922] [2022-11-03 01:35:42,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:35:42,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:42,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:42,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:35:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:35:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:42,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:43,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316502922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:35:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587361661] [2022-11-03 01:35:43,030 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 01:35:43,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:35:43,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:35:43,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:35:43,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:35:43,094 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 01:35:43,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 01:35:43,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 01:35:43,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 49 [2022-11-03 01:35:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:35:43,251 INFO L356 Elim1Store]: treesize reduction 226, result has 11.7 percent of original size [2022-11-03 01:35:43,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 276 treesize of output 278 [2022-11-03 01:35:43,340 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 9 iterations. Over-approximation may be very coarse. [2022-11-03 01:35:43,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-03 01:35:43,408 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:35:43,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '655#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:35:43,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:35:43,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:35:43,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 15 [2022-11-03 01:35:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007298813] [2022-11-03 01:35:43,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:35:43,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:35:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:35:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:35:43,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:35:43,717 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:35:43,787 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-11-03 01:35:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:35:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:35:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:35:43,788 INFO L225 Difference]: With dead ends: 34 [2022-11-03 01:35:43,788 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:35:43,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:35:43,789 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:35:43,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:35:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:35:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 01:35:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-03 01:35:43,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-11-03 01:35:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:35:43,797 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-03 01:35:43,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:35:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-03 01:35:43,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 01:35:43,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:35:43,798 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 01:35:43,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:35:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:35:44,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:35:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:35:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1901841878, now seen corresponding path program 5 times [2022-11-03 01:35:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:35:44,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740032970] [2022-11-03 01:35:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:35:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:35:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:35:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:44,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:35:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740032970] [2022-11-03 01:35:44,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740032970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:35:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020310484] [2022-11-03 01:35:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:35:44,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:35:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:35:44,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:35:44,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8035431b-d681-424c-90ae-221acdcf288d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:35:44,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:35:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:35:44,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:35:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:35:44,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 23 treesize of output 24 [2022-11-03 01:35:44,756 INFO L356 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2022-11-03 01:35:44,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 58 [2022-11-03 01:35:44,853 INFO L356 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2022-11-03 01:35:44,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 55 treesize of output 75 [2022-11-03 01:35:45,290 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-03 01:35:45,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 25 [2022-11-03 01:35:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:35:45,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:35:49,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 56 [2022-11-03 01:35:49,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13724606 treesize of output 13675454 [2022-11-03 01:36:23,379 WARN L234 SmtUtils]: Spent 33.48s on a formula simplification that was a NOOP. DAG size: 5189 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:38:55,755 WARN L234 SmtUtils]: Spent 57.62s on a formula simplification. DAG size of input: 3612 DAG size of output: 3612 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:39:52,402 WARN L234 SmtUtils]: Spent 16.16s on a formula simplification that was a NOOP. DAG size: 3220 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:40:33,254 WARN L234 SmtUtils]: Spent 28.11s on a formula simplification. DAG size of input: 1649 DAG size of output: 1649 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:40:57,887 WARN L234 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 1647 DAG size of output: 1647 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:41:25,158 WARN L234 SmtUtils]: Spent 22.32s on a formula simplification. DAG size of input: 1645 DAG size of output: 1645 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:42:07,303 WARN L234 SmtUtils]: Spent 31.52s on a formula simplification. DAG size of input: 1248 DAG size of output: 1248 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:42:57,419 WARN L234 SmtUtils]: Spent 44.81s on a formula simplification. DAG size of input: 1248 DAG size of output: 1248 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:43:19,076 WARN L234 SmtUtils]: Spent 17.55s on a formula simplification. DAG size of input: 1248 DAG size of output: 1248 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:43:31,743 WARN L234 SmtUtils]: Spent 10.28s on a formula simplification. DAG size of input: 1248 DAG size of output: 1248 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:47:58,894 WARN L234 SmtUtils]: Spent 46.72s on a formula simplification. DAG size of input: 1643 DAG size of output: 1643 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:48:58,180 WARN L234 SmtUtils]: Spent 55.05s on a formula simplification. DAG size of input: 1641 DAG size of output: 1641 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:49:45,834 WARN L234 SmtUtils]: Spent 42.87s on a formula simplification. DAG size of input: 1639 DAG size of output: 1639 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:50:14,251 WARN L234 SmtUtils]: Spent 23.64s on a formula simplification. DAG size of input: 1639 DAG size of output: 1639 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-03 01:50:55,987 WARN L234 SmtUtils]: Spent 38.09s on a formula simplification. DAG size of input: 1393 DAG size of output: 1393 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)